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HomeMy WebLinkAboutWWP272109 (6)a 0 Wetland Delineation Report Higate Sewage Lift Station Elimination Renton, Washington Prepared for: AGRA Earth & Environmental and City of Renton December 1996 430 E N T R A N C O i' LV d m a 0 Wetland Delineation Report HIGATE SEWAGE LIFT STATION ELIMINATION Renton, Washington Prepared for AGRA Earth & Environmental 11335 NE 122nd Way, Suite 100 Kirkland, Washington 98034-6918 (206) 820-4669 and City of Renton 200 Mill Avenue South Renton, Washington 98055 (206) 277-6179 Prepared by ENTRANCO 10900 NE 8th Street, Suite 300 Bellevue, Washington 98004 (206) 454-5600 December 1996 CONTENTS Page INTRODUCTION 1 BACKGROUND 1 FIELD INVESTIGATION METHODOLOGY 1 FIELD INVESTIGATION 8 Field Data Results 10 Wetland Delineation Results 14 POTENTIAL WETLAND IMPACTS During Construction 14 During Operation 15 CONCEPTUAL MITIGATION 15 REFERENCES Published Documents 16 APPENDIX A - Wetland Map from Original Alignment B - Wetland Map from Surrounding Property C - Growing Season Table D - Completed Data Forms E - Earthen Trench Plug 960381 Report I Wetlands (12J18196) 1 jc 1 FIGURES Page 1. Project Vicinity 2 2. Proposed New Sewer Line Corridor 3 3. NWI Wetlands in the Project Area 4 4 City Inventory Wetlands in the Project Area 5 5. Wetland Delineation Map 9 TABLES Page 1. Plant Status and Chance of Growing in a Wetland 6 2. Soils in the Project Area 7 96038 / Report I Wetlands (12118/96) / jc II INTRODUCTION This wetlands investigation is for the proposed Higate Sewer Lift Station Elimination project, which is located in Section 5, Township 23 North, Range 5 East, W.M., and in the City of Renton (figure 1). The proposed new buried sewer line would be located in the northeastern quadrant of the intersection of Jones Avenue NE and NE 20th Street along a 15-foot-wide utility easement (figure 2). The investigation was performed to identify and to delineate the jurisdictional boundary of wetlands within 65 feet of the utility easement. BACKGROUND Two previous wetland studies have been conducted in the project vicinity. These studies were reviewed prior to conducting the current field investigation. The first study was prepared for the original alignment for proposed new sewer line (the original alignment was approximately 120 feet west of the current alignment along NE 20th Street). The results from this investigation indicated wetlands were along only the immediate creek channel and around the existing excavated pond (Appendix A, Phelps 1993). The second investigation was conducted for a private land owner who owns much of the property the proposed new sewer line will cross. The results from this investigation indicated that the wetlands extend across much of the creek valley (Appendix B, David Evans & Associates 1994). Maps from both the U.S. Fish and Wildlife Service National Wetland Inventory (USFWS NWI) and the City of Renton also were examined to see if these government agencies had identified any wetlands as occurring in the project vicinity. The NWI map (USFWS 1988) indicates a seasonally flooded, palustrine (freshwater) scrub -shrub wetland (PSSC, Cowardin et al 1979) in the project area (figure 3). This site corresponds to the blueberry farm immediately south of NE 20th Street and the existing sewage lift station (which is to be eliminated). The City of Renton's wetland map (Renton 1992) indicates a wetland in the same area, but shows the wetland extending north of NE 20th Street (figure 4). FIELD INVESTIGATION METHODOLOGY The wetland investigation was conducted using the "Routine On -site Determination Method" described in the Corps of Engineers Wetlands Delineation Manual (Environmental Laboratory 1987), as modified (Corps 1991 and 1992). For jurisdictional purposes, wetlands are defined by the U.S. Army Corps of Engineers (Corps) and Environmental Protection Agency (EPA) (Federal Register 1982 and 1980) as: 960381 Report I Wetlands (12118196) 1 jc Higate Sewage Lift Station - Wetland Delineation Report I r. 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Uj Z ira IV �9E � r h -lot 3 .,- 19 Alai- tie O iJS 14 lot 4 6`3 30 /ss 3 f t 1 J41 Vc 1 /so• I L V %i 1 PX"7.pl A Zt I (,° cc 56.. r roc.88 /2� /oo.� ' f /24 203 — J. n_ a NE 20th Street 0 Stationr Report © Figure E N T R A N C O Proposed New Sewer Line Corridor -t ..115 G4 - - - 53- ` � ,; , ,:��• ,- - �� � .i'`'�: �� T \; ;{ •;� ., _ - _,j ;'° .i rIAC Pf i� c��,, ��: / t , , :\ ;� _, • Pao{� �1 ` ��'��`_y it may ' �i k: � • Wit:• � '1! •, . 1�;�.: ' \ � � �/i ���� �,; ram. � ' 9. �,\�� 00 � IBC • �' , i ^'� at � � L \ ��`.\• kena dale fA FEMC / R3UBH �y�i�.p. —�-- ►"" � �ti- ...1 _�_.-.�,.�ti-� _ Al ri �� �t'M'+��:�.,C',�'+C.rtg�{�;..C-.n]-�tIF v Ia �� `_ r•: - '�•�'�iv--..Y.� { r A/. � � `�%.• ccqq i i`�� yam_ 1, L 7`,Q 1 i ' 4N w � t .;)• .t�'��IC.Y�•.' ,r. � ". •;• .. �-.y��4'T1`cF!�►aYw�-'::� _I t L.ti.�`�iS, ,..�1 i''... 5'. •!i!�~`:•—ec2 `:i1 a elSR;•�e�.:.'ius� i C =PUBF1 (pV77 T'�"e • dd T ;,;L `[. t : r \ _ ?i.\ y L;,' d.4 `• v S�•,,=• - cam, .. 'C .r�':':,_• �..; \�A. 2 `;�. -��`� � t.�-,►a`„" j`ar'. !I� '4.� �1ti.Y�++�-•• i�(�t tk^tl'Kx'• \ . lk n _'3 Dl" � .� " IfSC,��`N+ :v, r. � ! c��✓ttiY'i,. � �i-i ; �� ``�./. 3 \ f` �� �fiw,•' ' '`. ' 1 s 7�,.��`..r+r6 '-3`�'ry ;i,y+}.yr., Kr.--r �,_ m r. rrTO \ '` 'J/ � �+ \ V t ^:r \ � JI���'t'-•"'�.�%,.' .'�. `,��r :�� a � 4 '�y� � 4- - � i. �1.. �':rk l�A.,,e;.•F� - m�` t / /�°;,PEmGAx__� ]. - :xx�inl,��'.c+�._ _ �,��. a..'"._�.�. e_.i'� 1 .�;,. �� ��. 1 •-. _2,�:�.�y,��••_�.__ x O 10 O Higate Sewage Delineation Report m Figure 3 © E N T R A N C O NWI Wetlands in the Project Area N ,O2 20 Co �J 1 r--J t V) S-9 - Lo_� > IA,- W Q. v ✓ —3 #W-47 S-13 'GTOVLa S—�4 0. ��- L- W-2 6 S-10 17 7 W3K W1 K W4K S26K r K 3 S28K - N.E. 27TH STREET L 1 t w I t W i29 Q S-11 iz t NE 20th street I i ,_!PROJECT LOCATION I L-1 w J= S S-18 i IF I c \ sill a 1��i11 I I �% I FIGURE #3 \ CITY OF RENTON WETLANDS m 1 1 1 1 1 "" . INVENTORY MAP m HAM MON0. COLLIER S WAD E — LIVIN GSTON E ASSO CIATES. INC. x Higate Sewage Lift Station - Wetland Delineation Report ©Figure 4 ENTRAN CO City Inventory Wetlands in the Project Area "Those areas that are inundated or saturated by surface or ground water at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs, and similar areas." The presence of the three essential wetland characteristics (i.e., wetland vegetation, soils, and hydrology) were examined by looking for positive indicators of each characteristic. Examination for wetland (hydrophytic) vegetation is done within different plant communities (i.e., communities that are composed of significantly different species of plants). Each plant community along the suspected wetland/non-wetland boundary is identified and described and a data point is selected in each different plant community. Plant species are identified around that data point for each different stratum (e.g., tree, sapling, shrub, and herb). The sampling area around the data point is a 30-foot radius for the tree stratum and a 5-foot radius for the sapling, shrub, and herb strata. Through visual estimating, the plants are given a percentage of coverage in each stratum sampling area. The dominant plants in each stratum are determined by selecting plants which have a coverage of 20 percent for each stratum. These plants are included on the list of dominant species. Plant species were identified using the Flora of the Pacific Northwest (Hitchcock and Cronquist 1973). Plants were further identified as to the estimated probability of their chance of occurring in wetland and non -wetland environments, based on the National List of Plant Species That Occur in Wetlands (Reed 1988a,1988b, and 1993 and Corps 1994) as shown in table 1. Table 1 Plant Status and Chance of Growing in a Wetland Indicator Categories Symbol Estimated Probability Obligate Wetland OBL >99% Facultative Wetland FACW 67%-99% Facultative FAC 34%-66% Facultative Upland FACU 1 %-33% Obligate Upland UPL <1 % The dominant species and their indicator category for all strata are combined together to determine if the identified dominant vegetation meets the criteria that wetland plants %038 / Repo(t / Wetlands (12/18/96) / jc 6 comprise most of the plant community. In general, the criteria to meet the wetland vegetation requirements occurs when the dominant plants that have an OBL, FACW, and/or FAC indicator (see table 1) account for more than 50 percent of the total list of dominant species. When this "greater than 50 percent' threshold occurs, the data point is said to have a positive presence of wetland vegetation. In addition to the percent coverage method, there are other indicators for identifying wetland vegetation. If the plants are observed to be growing under saturated or inundated conditions during the growing season, regardless of the indicator status, the plants should be considered as acting like wetland plants. Morphological, physiological, and reproductive adaptation, and evidence from technical literature also are used to determine if the plant is acting as wetland vegetation. If there is strong evidence of these other indicators, the plant community should be said to have a positive presence of wetland vegetation. Examination for wetland (hydric) soils starts by digging a pit at the data point and assessing the soil characteristics. Indicators for hydric soils include: (1) organic soils; (2) histic epipedons; (3) sulfidic materials; (4) aquic or peraquic moisture regimes; (5) direct observation of reducing soil conditions; (6) gleyed, low chroma, and low chroma/ mottled mineral soils; (7) soils on the local or national hydric soils list (note: care must be taken here so as not to include remnant hydric soils); (8) iron and manganese concretions; and (9) coarse textured or sandy hydric soils that have high organic matter content in the surface margin, dark vertical streaks of organic matter in subsurface horizons, or an organic pan (i.e., wet spodosol, an organic layer "floating" underground at the water table). Mineral soils were examined using the Munsell Soil Color Charts (Kollmorgen 1988) .and the soil characteristics of the project area were reviewed with the Soil Survey King County, Washington and King County Area Hydric Soils List (USDA Soil Conservation Service 1973 and 1989) for hydric soil indicators (table 2 and Appendix B). Soils with a hydric inclusion are soils that, for mapping purposes and constraints, can have small patches of wetland soils (hydric soils) included in the soil area. Table 2 Soils in the Project Area Soil Hydric Sym. Soil Name Slope Hydric Inclusion Inc Indianola loamy fine sand 4-15% no no Sm Shalcar muck 0-1 % yes n/a 96036 / Report / Wetlands (12/18/96) / jo Examination for wetland hydrology starts by visually scanning across the site and in the soil pit, to check for indicators of wetland hydrology. These primary field indicators, in descending order of reliability, include: (1) visual observation of inundation; (2) visual observation of soil saturation in the upper 12 inches; (3) water marks; (4) drift lines; (5) water -borne sediment deposits; and (6) wetland drainage patterns. Secondary field indicators include evidence of: (1) oxidized root channels (rhizospheres) associated with living roots and rhizomes in the upper 12 inches; (2) water stained leaves; (3) local soil survey data; and (4) FAC-neutral test (note: Corps approval is required to use this test). The manual further defines the jurisdictional timing and duration of inundation and soil saturation to meet the hydrology criteria. Non -tidal areas that have a duration of inundation and/or soil saturation greater or equal to 5 percent of the growing season may have wetland hydrology. Sites with 12.5 percent or greater duration of the growing season are considered to have a positive presence for wetland hydrology. The growing season is defined as surface temperatures greater than 28 degrees Fahrenheit, for at least 50 percent of the year. The growing season for the site was determined as being 253 days long based on the USDA Soil Conservation Service (now the Natural Resources Conservation Service) Soil Survey for King County Area, Washington (USDA SCS 1973) (Appendix C). The 5 and 12.5 percentages translate into roughly 13 and 32 days, respectively. FIELD INVESTIGATION The field investigation was conducted on August 7 and 8, 1996. The weather during the field investigation was sunny and hot. Since the field examination occurred during the driest time of the year, professional judgment was used in some cases, to determine the presence of wetland hydrology. Nine data points were located on the site to look for positive indicators of the three essential wetland characteristics: wetland (hydrophytic) vegetation, wetland (hydric) soils, and wetland hydrology. Data gathered was used to determine the boundary of the project wetland. These data points correspond to the soil pits (SP) and were numbered SP1 through SP9 on pink survey flagging. Cross ditches over the utility easement were also labeled and flagged with pink survey tape. The data points are shown on figure 5, the completed data forms are attached as Appendix D. Soils colors were taken from wet samples unless noted otherwise. 96038 / Report / Wetlands (12J18/96i / is 8 SI 41 1 80 160 �e Ey a Sewer Construction Easement 1 ". \ka � r'`• a �CO [6 f a 1 I t N 4 T•� WETLAND ��*•- 1 �. a a N At a 3 Pond SO' WETLAND OUEFLR -- �Y • . ■ . , , � CFI �� I ' ►w os►w ,rnr o ewt v w,om. r a r rt- a_ f� - -N-=:_ F...-..----- - - f ... ■ aN M.>. •O •.w Nq .tl. .lrR� 4 .^la 1r■r rU1 rm r I MM.Oe. Al M1N I)rtb„n.uc,W Ob,Y.h .w, vJw ,.1w1 KAA■ n!fimx¢IYA. t< Mn•ry n ew. ... onwrxma --� WETLAND o j fj , --•... -•--............. ...-----..__.......40 . Hlgate Creek � I rY wN j A w -_ - 4m -Mlimit --- SM NON- WL f LAND I . SRI Blueberry Farm g Legend C14 SOII Pit • - -- z Flag -------------------- ----------- - -- Wetland N — - �-�`— Jones Avenue HE --w — _ _ Delineated Wetland Boundary aN '3'1Y S.atJCl' t----, m` —w — — Approximate Wetland Boundary Vrt.Q -+ 50' Buffer Zone 3 i e N rd� �t t1Y m rn S 0 m co m Higate Sewage1WetlandDelineationReport m /-- - MEAAM ARFA FIRED FOR / VRrXE fAYRT "OkAW 91[ i�a*} 0' Wetland Buffer E Single -Family 'Residences I L r O Figure 5 E N T R A N C O Wetland Delineation Map Field Data Results Data Point 1. The data point is located in roughly the mid -point along the north/south leg of the new sewer line corridor, and in a scrub -shrub plant community dominated by hardhack (Spiraea douglash), lady fern (Athyrium filix-femina), giant horsetail (Equisetum te/mateia), and Himalayan blackberry (Rubus procera). These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP1) was dug to a depth of 12 inches to look for positive indicators of hydric soils and wetland hydrology. Although the soil was organic (a hydric soil indicator), the soil color was still examined. The soil was determined to be a 10YR 2/1 color throughout the core. With the organic soil, hydric soils were considered to be present. The soil pit was saturated to the surface and free standing water was 6 inches below the surface. The wetland hydrology characteristic was considered to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 2. The data point is located south of Data Point 1 up a small knoll, and is in a scrub -shrub plant community dominated by Himalayan blackberry, giant horsetail, and hedge bindweed (Convolvulus sepium). Although not listed as a wetland plant, the blackberry is known to be a vigorous grower in seasonally flooded wetlands. In this case, the blackberry was considered to be acting as a wetland plant, based on the shallow water table. The positive presence of hydrophytic vegetation was assumed. A soil pit (SP2) was dug to a depth of 15 inches to look for positive indicators of hydric soils and wetland hydrology. The soil was organic (a hydric soil indicator) in the upper 6 inches and mineral below this. The soil color was examined in the sandy mineral soil and was determined to be a 10YR 3/2 color. A strong sulfidic odor was also present in the soil. With the 6-inch organic soil layer (histic epipedon) over the saturated sandy soil, hydric soils were considered to be present. The soil pit was saturated at 12 inches and free standing water occurred 15 inches below the surface. The typical groundwater level was assumed to be much higher at the beginning of the growing season (March). The wetland hydrology characteristic was considered to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 3. The data point is located west of Data Point 1, up on a slight mound. The data point is in a plant community dominated by red alder (Alnus rubra), giant horsetail, and Himalayan blackberry. These plants together indicate the presence of hydrophytic vegetation. 96038 1 Report / Wetlands (12/18/96) / jc 10 A soil pit (SP3) was dug to a depth of 18 inches to look for positive indicators of hydric soils and wetland hydrology. The soil has an organic layer (a hydric soil indicator) in the top 12 inches and a mineral soil below. The silty textured mineral soil was determined to be a 10YR 3/1, with mottles of a 10YR 4/4 color. With the organic soil layer (histic epipedon) over the low chroma, silty mineral soil, hydric soils were considered to be present. No water or saturation was observed in the soil pit. But due to the proximity and shallow elevation change from the surrounding area determined to be a wetland, the soil pit would be expected to be saturated within 12 inches of the surface, at the beginning of the growing season, for a sufficient duration to meet the jurisdictional hydrology requirements. The wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were. met. Data Point 4. The data point is in a disturbed plant community (i.e., front yard of a house and maintained as a lawn) just north of NE 20th Street, and is dominated by creeping buttercup (Ranunculus repens), velvet grass (Holcus lanatus), horsetail (Equisetum sp., likely telmateia), and unidentifiable grasses (due to the mowing). These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP4) was dug to a depth of 12 inches to look for positive indicators of hydric soils and wetland hydrology. Although the soil was organic throughout the core (a hydric soil indicator), the soil color was still examined. The soil was determined to be a 10YR 2/1 color in the upper 12 inches and 7.5YR 2/0 below that point in the core. With the organic soil, hydric soils were considered to be present. The soil pit was saturated to 4 inches from the surface and free standing water occurred 6 inches below the surface. The wetland hydrology characteristic was considered to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 5. The data point is located north of Data Point 1, next to a fallen and grown over barn. The data point is in a scrub -shrub plant community dominated by reed canarygrass (Phalaris arundinacea), giant horsetail, and Himalayan blackberry. These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP5) was dug to a depth of 18 inches to look for positive indicators of hydric soils and wetland hydrology. Although the upper part of the soil was organic (a hydric soil indicator), the soil color was still examined for the mineral soil below. The soil was determined to be a 10YR 3/2 color (dry) in the sandy/mucky soil from 0 to 7 inches. From 7 to 14 inches, the sandy loamy soil was determined to be a 10YR 5/2 color with 960381 Report 1 Wetlands (12/18/96) 1 jc 11 abundant mottles of both 7.5YR 4/4 and 7.5YR 5/6 colors. Below 14 inches, the soil was a 10YR 5/2 color with mainly 10YR 5/6 colored mottles. With the low chroma, mottled mineral soil, hydric soils were considered to be present. The soil pit was saturated to a depth of 14 inches below the surface, however, free standing water was not observed in the soil pit. Based on the depth of saturation (i.e., close to 12 inches below the surface) and time of year during the field investigation, the wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 6. The data point is just upslope to the north of Data Point 5 and is in a scrub -shrub plant community dominated by Himalayan blackberry, which by itself, does not indicate the presence of hydrophytic vegetation. A soil pit (SP6) was dug to a depth of 24 inches to look for positive indicators of hydric soils and wetland hydrology. The sandy mineral soil was determined to be a 10YR 3/2 color, with no mottles, from 0 to 10 inches deep, 10YR 4/4 from 10 to 24 inches deep, and 10YR 5/4, with some slight soil discoloration noticeable. With no hydric indicators observed in the mineral soils, hydric soils were not considered to be present. No indicators of wetland hydrology was observed in the soil pit or surrounding area. The wetland hydrology characteristic was not considered to be present. This data point was determined not to be a wetland since none of the essential wetland requirements were met. Data Point 7. The data point is located on the northern portion of the project, along the east/west leg of the new sewer line corridor in a scrub -shrub plant community dominated by Himalayan blackberry, giant horsetail, hardhack, and red alder. These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP7) was dug to a depth of 24 inches to look for positive indicators of hydric soils and wetland hydrology. The sandy mineral soil was determined to be a 10YR 3/1 (dry) color to 10 inches deep, and a 10YR 6/2 (dry) color, with abundant 7.5YR 4/6 mottles from 10 to 24 inches deep. With the low chroma, mottled mineral soil, hydric soils were considered to be present. No inundation or saturation was observed in the soil pit during the field investigation. However, based on the proximity and relative location in the topography to the creek, the site would likely have sufficient water during the beginning of the growing season to meet the hydrology criteria. With this in mind, the wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. 96038 / Report I Wetlands (12118/96) / is 12 Data Point 8. The data point is located upslope from Data Point 7, and is in a scrub - shrub plant community dominated by Himalayan blackberry, salmonberry (Rubus spectabilis), and red alder. These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP8) was dug to a depth of 24 inches to look for positive indicators of hydric soils and wetland hydrology. All soil colors were determined using dry samples. The sandy mineral soil was determined to be a 10YR 2/1 color from 0 to 9 inches deep, 10YR 6/2.5, with very slight 10YR 5/6 mottles from 9 to 18 inches deep, and 10YR 6/2, with strong 10YR 4/6 mottles from 18 to 24 inches deep. Although slight, the mottling in the low chroma mineral soil appear sufficient to meet the wetland soils criteria. Hydric soils were considered to be present. No indicators of wetland hydrology were observed in the soil pit or surrounding area. Based on the proximity and higher elevation relative to the creek, the site would likely not have sufficient water during the beginning of the growing season to meet the hydrology criteria. The wetland hydrology characteristic was not considered to be present. This data point was determined not to be a wetland since only two of the essential wetland requirements were met. Data Point 9. The data point is located in the field (likely old pasture) north of the new sewer line corridor and west of the creek. The data point is in an emergent plant community dominated by reed canarygrass, giant horsetail, soft rush (Juncus effusus), creeping buttercup, and quackgrass (Agropyron repens). These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP9) was dug to a depth of 18 inches to look for positive indicators of hydric soils and wetland hydrology. All soil colors were determined using dry samples. The sandy mineral soil was determined to be a 10YR 3/2 color, with no mottles, from 0 to 9 inches deep, and a 10YR 5/2 color, with both 10YR 5/6 and 7.5YR 4/4 colored mottles from 9 though 18 inches deep. With the mottled, low chroma mineral soil, hydric soils were considered to be present. No inundation or saturation was observed in the soil pit during the field investigation. However, based on the proximity and position in the landscape relative to the creek, the site would likely have sufficient water during the beginning of the growing season to meet the hydrology criteria. With this in mind, the wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. 96038 1 Report / Wetlands (12/18/961 / p 13 Wetland Delineation Results The wetland was flagged with blue survey tape and marked as assessment area AA-1 through AA-12 with in the project corridor. The wetland boundary outside of the corridor was visually estimated. The wetland is directly connected to the creek corridor and is fed by surrounding seeps in several locations. The entire wetland is estimated to be roughly 5-8 acres in size. Though historically used as a pasture, and now overgrown with blackberry and red alder, the wetland would meet the criteria as a Category 2, High Quality Wetlands, since the site is a headwater wetland (Renton 1992b). Category 2 wetlands require a standard buffer of 50 feet. The disturbed portion of the wetland (i.e., residence next to NE 20th Street), would, by itself, meet the criteria as a Category 3, Lower Quality Wetlands. This is based on the presence of fill for the house and garages. Category 3 wetlands require a standard buffer of 25 feet. However, since this area is connected to the main portion of the wetland, this disturbed area also would be considered a Category 2 wetland with a 50- foot buffer. The creek would have a buffer of 25 feet. Any activity in the wetlands may require permits from federal, state and city resource agencies. These permits may include: Permit/Approval/Review Resource Agency Section 404, Nationwide Permit U.S. Army Corps of Engineers Water Quality Modification Washington State Department of Ecology Hydraulic Project Approval (HPA) Washington State Department of Fish and Wildlife SEPA Review Wetland Permit City of Renton City of Renton POTENTIAL WETLAND IMPACTS Based on the most current plan set (11/1/95), the impacts to the wetland were estimated for activities during construction and during operation. Cumulative and secondary impacts are not addressed in this report, since the project details are not completed. Cumulative and secondary impacts, however, should be considered and included as part of the wetland mitigation plan preparation. During Construction Impacts during construction are those which may temporarily affect the wetland's vegetation, soils, and hydrology. The project utility corridor is 15 feet wide and the 96038 1 Report i Wetlands (1206/96) / jo 14 construction easement corridor is approximately 15 feet wide. Construction for the new sewer line would likely affect all the wetlands in these corridors. The 30-foot-wide construction corridor would impact roughly 13,350 square feet of wetlands. The construction also would impact 6,600 square feet of wetland buffer area. Material storage is expected to occur outside of the wetlands. During Operation Impacts during operation are those which may permanently affect the wetland's vegetation, soils, and hydrology. No permanent impacts are anticipated for the proposed project. CONCEPTUAL MITIGATION As with impacts, mitigation can be for temporary impacts (construction) and permanent impacts (operation). Typically, temporary impacts to wetlands can be mitigated by restoring the site after construction. However, mitigation criteria set at the beginning of construction can minimize the impacts and aid in the wetlands recovery. Mitigation for temporary impacts, in no particular order, may include: to narrow the construction corridor to minimize the amounts of wetlands disturbed • protect large trees in the corridor and wetlands out of the corridor, with clearing limit fencing • cut the vegetation to leave short stems and roots for rapid regrowth • use log mats or geotech fabric and hogfuel to limit soil disruption • stockpile surplus soils away from wetlands • use earthen trench plugs periodically to avoid "piping" along new sewer line (refer to a typical detail in Appendix E). • maintain subsurface cross water flow, by using either a drainage blanket or pipes • discharge water pumped out of the construction trench to points outside of wetlands, possibly using the current sewer system, or do not drain the trench and `work in the wet" • construct only during dry weather and within the HPA fisheries window • separate and bypass flowing water in the ditches and creek from the construction trench 96038 / Reporl I Wetlands (12/18/96) / jc 15 reuse existing hydric soils and reshape the landscape to pre -construction conditions revegetate the disturbed wetland and buffer with native plant species. • maintain and monitor the revegetated areas to assure adequate establishment of the native vegetation Mitigation for permanent impacts may need to follow the criteria in the Wetland Management Ordinance (Renton 1992b) to compensate for any permanent loss of wetlands. Mitigation can be creation of new wetlands from upland areas or restoration of degraded wetland areas. In case there were to be impacts to the wetlands, the Category 2, scrub -shrub wetlands permanently affected would need to be compensated at a 2:1 ratio. Wetland buffers permanently lost also would require mitigation. If needed, a potential mitigation site could be the reed canarygrass dominated wetland plant community along the new sewer line corridor. This site is located just north of the lot along NE 20th Street. Mitigation at this location could be in the form of a wetlands restoration effort. If permanent impacts were to occur, a mitigation report and plan would need to be created when specific impacts are determined. A mitigation report would contain the environmental goals and objectives, performance standards, wetland construction plans, monitoring plans, and a contingency plan for the mitigation effort. However, with no permanent impacts anticipated for the project, no creation mitigation for replacement wetlands is expected. REFERENCES Published Documents Adamus, Paul R., Ellis J. Clairain, R. Daniel Smith and Richard E. Young 1987 Wetland Evaluation Technique (WET); Volume II: Methodology, Operational Draft Technical Report Y-87-_, U.S. Army Corps of Engineers Waterways Experiment Station, Vicksburg, MS. Cowardin, Lewis M., Virginia Carter, Francis C. Golet and Edward T. LaRoe 1979 Classification of Wetlands and Deepwater Habitats of the United States. Prepared for the Office of Biological Services, Fish and Wildlife Services, U.S. Department of Interior, Washington DC, FWS/OBS-79131. David Evans and Associates 1994 Wetland Delineation Letter. Prepared for private landowner. 96038 1 Report / Wetlands (12118/96) / jc 16 Environmental Laboratory 1987 Corps of Engineers Wetland Delineation Manual (1987 Manual). Technical Report Y-87-1, U.S. Army Engineers Waterways Experiment Station, Vicksburg, Mississippi. Federal Register 1991 33 CFR Part 330: Nationwide Permit Program Regulations and Issue, Reissue, and Modify Nationwide Permits; Final Rule. Part III Department of Defense, Corps of Engineers, Department of the Army, Vol. 56, No. 226, US Government Printing Office, Washington, D.C. November 22. 1982 Title 33: Navigation and Navigable Waters; Chapter Il, Regulatory Programs Corps of Engineers., Vol. 47, No. 138, p. 31810, US Government Printing Office, Washington, D.C. 1980 40 CFR Part 230: Section 404(b)(1) Guidelines for Specification if Disposal Sites for Dredged or Fill Material, Vol. 45, No. 249, pp. 85352-85353, US Government Printing Office, Washington, D.C. Hitchcock, Leo C. and Arthur Cronquist 1973 Flora of the Pacific Northwest: An Illustrated Manual. University of Washington Press. 1990 edition. Kollmorgen Instruments Corporation 1988 Munsell Soil Color Charts. Baltimore, MD. Kunze, Linda M. 1987 Puget Trough Freshwater Wetlands, A summary of Biologically Significant Sites, Phase II: Southern Puget Trough Impounded Wetlands. Washington Natural Heritage Program. Prepared for the Washington State Department of Ecology. Phelps, Marilyn (Cascade Environmental Services) 1993 Wetland Delineation Report. Prepared for City of Renton. Puget Sound Water Quality Authority (PSWQA) 1994 Puget Sound Water Quality Management Plan Reed, Porter B., Jr. 1993 1993 Supplement to the List of Plant Species that Occur in Wetlands: Northwest (Region 9). U.S. Fish and Wildlife Service. 1988a National List of Plant Species that Occur in Wetlands: National Summary. U.S. Fish and Wildlife Service, Biological Report 88(24). 1988b National List of Plant Species that Occur in Wetlands: Northwest (Region 9). U.S. Fish and Wildlife Service, Biological Report 88(26.9). 960381 Report I Wetlands (12/18/96) I IF 17 Renton, City of 1992 Critical Areas Inventory Maps. Prepared with assistance from Jones and Stokes, and R.W. Beck. 1992b Wetland Management Ordinance. Chapter 32. U.S. Fish and Wildlife Service 1988 Mercer Island Quadrangle, National Wetland Inventory. U.S. Army Corps of Engineers (Corps) 1994 1993 Supplement to National List of Plant Species that Occur in Wetlands: Northwest (Region 9). March 31. 1992 Clarification and Interpretation of the 1987 Manual. Guidance memorandum. March 6. 1991 Questions & Answers on 1987 Corps of Engineers Manual. Guidance memorandum. October 7. 1990 Permit Requirements for Wetland Fill Projects. Information Paper. Seattle District. April 17. USDA Forest Service 1985 Management of Wildlife and Fish Habitats in Forests of Western Oregon and Washington, Part 1 - Chapter Narratives. Pacific Northwest Region. Published in cooperation with the U.S. Department of the Interior, Bureau of Land Management. USDA Soil Conservation Service 1989 King County Area Hydric Soil List. 1973 Soil Survey of King County Area Washington. Washington Natural Heritage Program (NHP) 1994 Endangered, threatened and sensitive vascular plants of Washington. Department of Natural Resources, Olympia. Washington State Department of Ecology 1993 Wetland Rating System. 960381 Report / Wetlands (12118/96) / tc 18 APPENDIX A Wetland Map from Original Alignment WETLAND #2 AREA ADJACENT �tol A, TO EXISTING 112 POND `,aL_.•,!� i..*_.. � _ :11la q— I]6 —�fff \�ai �, • .. I.S. } . •iva�—_.�i.2M • !IM�2`IG S ` + ' r I'� i� `aC!" — ,,• ls7 _ ��•S C`¢ �•. 'O 1 ° 20o• in /si 139 wp� >m wr 155 is + 1 .1 t I,, Lu ' • = a '1 JJ Q a 270 µme, 2 liAl A S _rV.- - =s<� .. 163 �y �_ =xis V = �i I //\ .1 ='a I! w. a a (IR�Cowta( 211, \ -ice »6272�. aa•,at7. + 1+, ! Q n -zrz' i �„ ;�� � at :!. , �� =�a SCALE 1 = 80 FEET ' 'r,` a aQMfe 1 r ! 1 7 3n Z I ! I LIT 316uj / t LARGE PASTURE ' N uw p WETLAND #3 , t< SMALL DITCH -31 >a TRIBUTARY TO�,>:a f , j� CREEK(326 • P•rURS 1 atu ---1r .. �! • am - a.5. hCT '�• t ' WETLAND #1 �•rtt� f ( ji EAST BANK OF CREEK, of • >�`" -- G ; 1 NORTH OF POHL RESIDENCE a>. O l KAY RESIDENCE r 370 '. an �r s12 n>�! 1 al � _ �•f� " �'\ava . 1 • I lr i sil •\„ u 1 t,,� DR. KAY'S PROPERTY 376 IL 346, 3-64 lam. . xs 1 •'� ti r aeo L •. a6a + ` ..r • � u.---- -- ... . __ . _ _ . C3y�i•1 •— sso sss' �'. Vsl. Siu �, "•� . , aas. _ ,., ... - - - .. as4w416 6 N. E 20TH STREET +� - - --- - '• 41-1 FIGURE #4 .,,PROJECT AREA AREA I ••• '� ." �'i� •� SURVEY MAP EXISTING BERRY FARM HAMMOND, COLLIER 6 WADE — LIVINGSTONE ASS CIAT ES, INC. APPENDIX B Wetland Map from Surrounding Property ' I I � I cz \3kcc ''Nil ►' _ I �_—n =J I• l ----1 It 1 `\ � II r I\il �:,; rt • II --1 I i ---� � 1 I IIIC for ► i .,; '. it ' l._a,Y-. lot • r,7 1 a.Vad ?4 /�„�nv /��, S ���� • a r!—f _ , � I I ��.,=.:�s _-1 l — is �s 1s.1� `�!� _--�.� J _ _ �• �. °C of . -- ��`• l.t I~�I�$ parQ���' '��p'�r'o� —�.J-1 1• ' f.,.,—� p APPENDIX C Growing Season Table TABLE 10. PROBABILITY OF FREEZING TEMPERATURES AFTER Probability in spring Station. Temperature 90 75 50 25 10 percent percent percent percent percent o� Bothell 2 N. 32 Apr. 18 Apr. 30 May 13 May 27 June 7 (elevation 100 feet) 28 Mar. 19 Mar• 30 Apr. 13 Apr. 27 May 8 24 Feb. 7 Feb. 21 Mar. 8 Mar. 21 Apr. 2 Cedar Lake 32 Mar. 21 Apr. 2 Apr. 15 Apr. 28 May 11 (elevation 1,560 feet) 28 Feb. 11 Mar. 1 Mar. 16 Mar. 30 Apr. 11 24 (L/) Jan. 29 Feb. 14 Mar. 1 Mar. 15 Landsburg 32 Apr. 15 Apr. 27 May 10 May 24 June 4 (elevation 535 feet) 28 Mar. 4 Mar. 16 Mar. 29 Apr. 11 Apr. 24 24 Jan. 8 Feb. 4 Feb. 19 Mar. 5 Mar. 18 Monroe 2 WSW. 32 Mar. 21 Apr. 3 Apr. 16 Apr. 30 May 12 (elevation 120 feet) 28 Feb. 21 Mar. 5 Mar. 19 Apr. 1 Apr. 14 24 Jan. 28 Feb. 17 Mar. 6 Mar. 17 Seattle -Tacoma Airport 32 Max. 15 Mar. 27 Apr. 9 Apr. 23 May 4 __C!-_l&va-t1 386 feet) 28 reb. 5 Feb. 23 -:Tan. Mar. 9 Mar. 23 Apr. 4_ 24 (L/) Feb. 9 Feb. 25 Med'. 9 Seattle University of Washington 32 Feb. 26 Mar. 10 Mar. 23 Apr. 6 Apr. 17 (elevation 113 feet) 28 Jan. 10 Feb. 2 Feb. 17 Mar. 2 24 (V) Jan. 17 Feb. 6 Feb. 19 Snoqualmie Falls 32 Apr. 11 Apr. 23 May 6 May 20 June 1 (elevation 430 feet) 28 Mar. 6 Mar. 18 Apr. 1 Apr. 14 Apr. 27 24 (L/) Feb. 8 Feb. 24 Mar. 10 Mar. 23 Vashon Island 32 Max. 10 Max. 23 Apr. 5 Apr. 18 May 1 (elevation 231 feet) 28 Jan. 14 Feb. 7 Feb. 23 Mar. 8 Mar. 21 24 Jan. 21 Feb. 9 Feb. 24 J Not reported. 90 fi SPECIFIED DATES IN SPRING AND BEFORE SPECIFIED DATES IN FALL Probability in fall Period betveen last occurrence 10 25 50 75 90 in spring and percent percent percent percent percent first in fall Days Sept. 12 Sept. 23 Oct. 5 Oct. 17 Oct. 28 145 Oct. 7 Oct. 18 Oct. 30 Nov. 1.1 Nov. 22 200 Oct. 22 Nov. 2 Nov. 15 Dec. 1 (L/) 252 Oct. 10 Oct. 21 Nov. 2 Nov. 14 Nov. 25 201 Oct. 29 Nov. 9 Nov. 22 Dec. 5 Dec. 27 251 Nov. 13 Nov. 25 Dec. 10 (il/) (i/) 299 Sept. 21 Oct. 1 Oct. 14 Oct. 26 Nov. 6 157 Oct. 21 Nov. 1 Nov. 13 Nov. 25 Dec. 6 229 Nov. 7 Nov. 19 Dec. 2 Dec. 21 (V) 286 Sept. 30 Oct. 11 Oct. 25 Nov. 4 Nov. 15 190 Oct. 22 Nov. 1 Nov. 13 Nov. 26 239 Nov. 2 Nov. 14 Nov. 27 Dec. 13 T) 283 Oct. 10 Oct. 21 Nov. 2 Nov. 15 Nov. 25 207 Oct. 26 Nov. 5 Nov. 17 Dec. 2 Dec. 16 ____2j3. Nov. 20 Dec. 5 (1 ) 1 1 ) 325 Oct. 26 Nov. 6 Nov. 18 Dec. 1 Dec. 11 240 Nov. 21 Dec. l Dec. 18 W) 319 Dec. 3 Dec. 19 T T) 348. Sept. 16 Sept. 27 Oct. 9 Oct. 21 Nov. 1 156 Oct. 16 Oct. 27 Nov. 8 Nov. 20 Dec. 1 221 Nov. 8 Nov. 19 Dec. 2 Dec. 19 (i/) 281 Oct. 15 Oct. 26 Nov. 7 Nov. 19 Nov. 30 216 Nov. 18 Nov. 24 Dec. 9 Dec. 31 (i/) 289 Dec. 2 Dec. 16 Dec. 31 (�) (� ) 3 44 91 468-266 0 - 73 - 6 APPENDIX D Completed Data Forms ROUTINE WETLAND DETERMINATION - DATA FORM Project/Site: Oa C'wner. nvLestigator(s): Do Normal Circumstances exist on the site? Is the site significantly & recently disturbed? (Atypical Situation) Is the area a potential Problem Area? (explain in final remarks) VEGETATION Dominant Plant Species Stratum Indicator 3. Percent of Dominant Species that are OBL. FACW or FAC (excluding FAG) % 8. 9. 1987 MANUAL Sec: Date: "K Township: 7.Z" County: fh/ ,- Range: �E:—: State: Washington (Yes No Plot ID: c� i Yes (No, TransectID:' Community ID: Yes S� 10. — Hydrophytic Vegetation Present? i!as No Basis for determination: ay ice.. REMARKS: pyc' O I d 'W-I('k, HYDROLOGY .Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12' Aerial Photographs Saturated in Upper 12' Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAG -Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Field Observations p Depth of Surface Water. ��(in.) Depth to Free Water in Pit:_(in.) Depth to Saturated Soil: (in.) Wetland Hydrology Present? Yes ` No REMARKS: Basis for determination: a 5 d 6--J L4--11-i0P O Ii.- SOILS i nn Soils Mapped As: I {n o� I Orrv�fa l c1C-%V\Ak, `and) Drainage Class: Field Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth finchesl Horizon 0--q -I Qt d .� Matrix Color (Munsell Moist) 3 ti. Hydric Soil Indicators: _ Histosol _ Histic Epipedon _ SuHidic Odor _ Aquic Moisture Regime Hydric Sots Present? Ye Mottle Colors lMunsell Moist) Mottle (Abundance/Contrast) :.� _•� :r•� a �� - Reducing Conditions _ Organic Streaking in Sandy Soils Gleyed or Low Chroma Colors — Listed on Local Hydric Soils List Concretions Listed on National Hydric Soils List High Organic Content in Surface Layer in Sandy Soils No REMARKS: Basis for determination: Lp"j G1 ✓O» C& WETLAND DETERMINATION Is this Sampling Point Within a Wetland? 01 No INVESTIGATOR: Basis for determination: ROUTINE WETLAND DETERMINATION - DATA FORM 1987 MANUAL Pro' ite: f i :; i✓ Sec: > Date: plica C'wner. / -ii �/ Township: 7", r-County: ✓ /1iir. . ` gator(s): -1, 7 -1- t Range: State: Washington Do Normal Circumstances exist on the site? tomes No Plot ID: f✓ Is the site significantly & recently disturbed? (Atypical Situation) Yes ;-No' Transect ID: Is the area a potential Problem Area? (explain in final remarks) Yes .. Na Community ID: � J. VEGETATION �,,, L Dominant Plant Species Stratum Indicator lc:r�n it Plant Species Stratum Indicator 1. 4's cot"— �t,L s. 2. F7L 7.4ca /VAullO 1°h4-I/0we 3. AAU.k,) 1n f 6vc, 8. sdt II %U S1 - '� {{ _ ' ___ CL✓ 4. 9. C' GVtt G lei vciTG� -_ L L S. 1 O:Eci ' � •. �1r I Us _ Percent of Dominant Species that are Hydrophytic Vegetation Present? s No OBL. FACW or FAC (excluding FAC-) Col % Basis for determination: Oe/ g REMARKS: I Alb q) A4.0- rk oV-�A S HYDROLOGY Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12" Aerial Photographs Saturated in Upper 12' Water Stained Leaves Other Water Marks Local Sol Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Field Observations .,, � Depth of Surface Water. r� r. (in.) Depth to Free Water in Pit: ��"` _(n.) Depth to Saturated Soil:-LZA_(in.) Wetland Hydrology Present? Yes No REMARKS: V2t S o r i Basis for determination: r SOILS j Soils Mapped As: OK4LA Drainage Class: Feld Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth r� inches) ill 6 G —19) ll Matrix Color . Mottle Colors (Munsell Moistl (Munsell Moist) 1 o�iz-z%i - toy�-��a�61� 5YD A Texture oncretions. Structure. etc. W/ O✓a a.✓t�L Hydric Soil Indicators: Histosol Reducing Conditions �( --X\ Organic Streaking in Sandy Soils _ Histic Epipedon SuHidic Odor Gleyed or Low Chroma Colors Concretions _ Listed on Local Hydric Soils List Listed on National Hydric Soils List _ _ _ Aquic Moisture Regime _ High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present. Ye No REMARKS: Basis for determination: WETLAND DETERMINATION Is this Sampling Point Within a Wetland? Yes Flo J / INVESTIGATOR: %� �/ Basis for determination: �_1 0y� � Y�IiVCt YYIt'i1G -�- j CSC✓t ROUTINE WETLAND DETERMINATION - DATA FORM 1967 MANUAL - < Project/Site: Sec: `� Date: Applicant/C'wner: Township: County: I�i�JLr Investigator(s): /1.-1 -7* Range: State: Washington Do Normal Circumstances exist on the site? No Plot ID: ":::; P - 7 Is the site significantly & recently disturbed? (Atypical Situation) Yes ,p Transect ID: Is the area a potential Problem Area? (explain in final remarks) Yes 42D, Community ID: VEGETATION �~ !atr Dominant Plant Species Stratum Indicator t Plan' pecies Stratum Indicator F& Lj 6. R�ylm,; -1 L401, T- 1-w-AW 2 LC4� --LI M 14- 7. `,CLVJTUCC--1 Va UrVPIS 4 t A U I 3. - r:l l 8. S � i-� i �1 :� G�,I.!,r �• SqA 1 t r —1t- 4. fpp Yw C.l 9. ► 1� �"6jdr,�,.....r fD'c'.c..0 ��-r�_ �•-�. � K 'L- S. FACtA � �. Percent of Dominant Species that are HyFfrop �t egetation resent?; eNo OBL, FACW or FAC (excluding FAC-) _ % Basis for determination- p 1 //�� y�.�.. ? .0 % W L V2 r{ . REMARKS: V�QCf✓ S+tln ,t. LAtta � 11^&e^e.e, \. 4 -}41-e 4o 1�- l�P� U HYDROLOGY Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12" Aerial Photographs Saturated in Upper 12' Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Field Observations Drainage Patterns in Wetlands )I Depth of Surface Water. (in.) Depth to Free Water in Pit: aiq I on.) Depth to Saturated Sol -(in.) Wetland Hydrology Present? - es No Basis for determination: c, ?t . _ .- REMARKS: O r n Sbcv SOILS 1 (�� c+v Soils Mapped As: 1 10 Nd a l Q A v . Tr hG a-Aet Drainage Class: Feld Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color . Mottle Colors figs) Horizon (Munsell Moist) (Munsell (Munsell Moist) Hydric Soil Indicators: _ Histosol _ Histic Epipedon _ SuHidic Odor _ Aquic Moisture Regime Hydric Sails Present? Yes Basis for determination: I Mottle (Abundance/Contrast) Texture Concretions. Structure, etc. �jGnCdv� t V-1-v Serra u I &LA Reducing Conditions _ Gleyed or Low Chroma Colors _ Concretions High Organic Content in Surface Layer in Sandy Soils No REMARKS: 51..E 61 ✓Ova a VJ I r'iii le S . - _ ---- \1-44 WETLAND DETERMINATION Is this Sampling Point Within a Wetland? Yes No INVESTIGATOR: Basis for determination: - Organic Streaking in Sandy Soils Listed on Local Hydric Soils List Listed on National Hydric Soils List f ROUTINE WETLAND DETERMINATION - DATA FORM Project/S fte:gYT .Applicant/C'wner: h . Investigator(s): Do. Normal Circumstances exist on the site? Is the site significantly & recently disturbed? (Atypical Situation) Is the area a potential Problem Area? (explain in final remarks) VEGETATION Dominant Plant Species Stratum Indicator 2. 3. 4. S. Percent of Dominant Species that are OBL, FACW or FAC (excluding FAG-) c % r Sec:' Township: '2 -�- tJ Range: -(es N2�400 Yes Yes 1987 MANUAL Date: County: State: Washington Plot ID: 51! 9 6 Transect ID: Community ID: on. NOUN -1 • L __ 1 • • 9. 10. Hydrophytic Vegetation Present? Yes t0 Basis for determination: r `-' —� VAO i.K ..6'✓S REMARKS:lla�- HYDROLOGY Recorded Data (Describe in Remarks): Stream, Lake or Tide Gauge Aerial Photographs Other None PRIMARY Indicators Inundated Saturated in Upper 12' Water Marks Drift Lines Sediment Deposits Drainage Patterns in Wetlands SECONDARY Indicators Oxidized Root Channels in Upper 12- Water Stained Leaves Local Soil Survey Data FAG -Neutral Test Other (Explain in Remarks) Fi eld Observations �( .) p %�• (in.) Depth to Saturated Soil- _>7 (L (in.) Depth of Surface Water. ur. Depth to Free Water in Pit: Wetland Hydrology Present? Yes No REMARKS: Basis for determination: SOILS l Sails Mapped As: �)n l� U-v� tll I ba vv� e n e.T Drainage Class: Feld Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color Mottle Colors Mottle anchesl Horizon (Munsell Moistl (Munsell Moist) (Abundance/Contrast) Texture Concretions. Structure. etc. WO.fah of L,, W/ 0vACjY'Ic-c- sm Go �0r.0-+r on y rz✓ 5�' H Hydric Soil Indicators: Histosol _ Reducing Conditions _ _ Histic Epipedon _ Gleyed or Low Chroma Colors — _ Suffidic Odor _ Concretions Aauic Moisture Regime High Organic Content in Surface Layer in Sandy Soils Organic Streaking in Sandy Soils Listed on Local Hydric Soils List Listed on National Hydric Soils List Hydric Soils Present? Yes No,; REMARKS:. h b Basis for determination: wo Wk cG "S WETLAND DETERMINATION Is this Sampling Point Within a Wetland? Yes e INVESTIGATOR: Basis for determination: n o °wet 0,CA \AA r�► ��-{-�S ROUTINE WETLAND DETERMINATION - DATA FORM Project/Site: PP IicanUr.Owne Investlgat,or(s): �'�• �..- v Do Normal Circumstances exist on the site? Is the site significantly & recently disturbed? (Atypical Situation) Is the area a potential Problem Area? (explain in final remarks) VEGETATION . - ' ' ' Dominant Plant Species Stratum Indicator 1. phc�dc 2.r2.,A 3. LA 4. S. Percent of Dominant Species that are OBL, FACW or FAC (excluding FAG) REMARKS: 0 HYDROLOGY Recorded Data (Describe in Remarks): Stream, Lake or Tide Gauge Aerial Photographs Other None 1967 MANUAL J / Sec: Date: / n G/(, Township: 7 � County: / Range: C� State: Washington Yes No Plot ID: 4�l^ , Yes `No' Transect ID: Yes 0 Community ID: 6. CC-y v c 1V , A ill s eY r uA,, i-:... ej 7. 9. 10. Hydrophytic Vegetation Present? �es No (off Basis for determination: Y 7So° V.�4 PRIMARY Indicators SECONDARY Indicators Inundated Oxidized Root Channels in Upper 12' Saturated in Upper 12' Water Stained Leaves Water Marks Local Sol Survey Data Drift Lines FAG -Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Feld Observations tf U Depth of Surface Water. N'4- (in.) Depth to Free Water in Pit: > / 8 (n.) Depth to Saturated Sol: % (in.) Wetland Hydrology Present? `Yes? No Basis for determination: lr;. SOILS Soils Mapped As: Taxonomy (Series and Phase): Profile Description: Depth finchesl H40z8 o—1 I -7-/4" REMARKS: d�Yt Iki d f..artof Ck.umuff" Matrix Color . Mottle Colors Mottle (Munsell Moist) (Munsell Moist) (Abundance/Contrast) fo 3/2�d° of sl z ��►z-sr� Drainage Class: Feld Observations Confirm Mapped Type? Yes No • '�IF .ts, ,3 Hydric Soil Indicators: _ Histosol Reducing Conditions _ Organic Streaking in Sandy Soils _ Histic Epipedon Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List -L Suttidic Odor --A, Concretions _ Listed on National Hydric Soils List Aquic Moisture Regime _ High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? Y s No REMARKS: �.;•' �" _�-�' `�-��. Basis for determination �� � txl/ rAoCT(.t'^ _ WETLAND DETERMINATION � Is this Sampling Point Within a Wetland? (Yes No INVESTIGATOR: fir' Basis for determination: Ili ROUTINE WETLAND DETERMINATION - DATA FORM Project/Site: Applicant/C'wner: Investigator(s): /tit Do Normal Circumstances exist on the site? Is the site sign'rficantfy & recently disturbed? (Atypical Situation) Is the area a potential Problem Area? (explain in final remarks) VEGETATION Dominant Plant Species Stratum Indicator ,,� 2. H ° `C.u'S J a ✓%'•{-u _ 4. a YO-4/� 7 a. 9. 1987 MANUAL Sec: Date: Township: County: i�— Range: T State: Washington e_s- No Plot ID: Lt' e,fe-sD No Transect ID: es Community ID: S. 10. Percent of Dominant Species that are Hydmphytic Vegetation Present? es No OBL. FACW or FAC (excluding FAC-) % Basis for determination- REMARKS: -CA 'Y�.� P.c� C� �_Uvw�vt - - --- l Yam- 1"10t15'=-� J✓cam t l €! ^'� HYDROLOGY Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12" Aerial Photographs Saturated in Upper 12' Water Stained Leaves Other Water Marks Local Sol Survey Data None . Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Feld Observations 411 Depth of Surface Water._�1� (in.) Depth to Free Water in Pit: j�lin.) Depth to Saturated Sol: Wetland Hydrology Present? Yes No REMARKS: Sat_�� Mpg $+L.._ ;-" 40 Basis for determination: SOILS !!'' Soils Mapped As: S� a CZL� /'tau G NL Drainage Class: Field Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth rinchesi Horizon 0—� >IZ Matrix Color . Mottle Colors Mottle (Munsell Moist) (Mu sell Moist) (Abundance/Contrastl 10 r P-2/ I 7.5 2 o Hydric Soil Indicators: Histosol Reducing Conditions _ Organic Streaking in Sandy Soils Histic Epipedon _ Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List Suffidic Odor Concretions Listed on National Hydric Soils List Aquic Moisture Regime — High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? OY�es, No REMARKS: PN ' Basis for determination: WETLAND DETERMINATION ) Is this Sampling Point Within a Wetland? I es No INVESTIGATOR '= Basis for determination: 4Xtkv-s T ROUTINE WETLAND DETERMINATION - DATA FORM 1987 MANUAL Projeci(Site: l=ri -r -_ Sec: Date:-- o; � i Zd ��plicant/ .wner: �4:•,-N-� Township: �,r) County: -Invesligafor(s): Range: State: Washington Do Normal Circumstances exist on the site? Is the site significantly & recently disturbed? (Atypical Situation) (5s No Yes (;&a Plot ID: Transect ID: Is the area a potential Problem Area? .(explain in final remarks) r, . Yes �) Community ID: VEGETATION Dominant Plant Sr>ecies Stratum Indicator Domfa'M7Piant S� c Species Stratum Indicator `x t.��4�,�, ti(ub✓c.� 6.- y 2. �C.� . te�Y�&CL c, 7. Dew�l •a c ns�;o• NR; (1 3. st m^ Vo ly-L-1S Sept 4. 9.SDVb� aMp4t•.ct /�i`� l.Z� S. 10. YI L.U�t�tJ� -C,I•�Cr�h 6^c.. _� �t Percent of Dominant Species that are OBL, FACW. or FAC (excluding FAG) REMARKS: 'HYDROLOGY =: Recorded Data (Describe in Remarks): Stream. Lake or Tide Gauge Aerial Photographs Other None G-7 % Hydrophytic Vegetation Present? es No R=c.k fnr datarminatinn- p PRIMARY Indicators Inundated Saturated in Upper 12' Water Marks Drift Lines Sediment Deposits Drainage Patterns in Wetlands 6 0 SECONDARY Indicators Oxidized Root Channels in Upper 12' Water Stained Leaves Local Sol Survey Data FAC-Neutral Test Other (Explain in Remarks) Field Observations Depth of Surface Water:___J%0�_(in.) Depth to Free Water in Pit:AL')LIL(in.) Depth to Saturated Sol: (in.) 11 �p Wetland Hydrology Present? Yes ! No REMARKS: d3u Basis for determination: l — 0 1 Att 11x Cl. GJD <r,t j N SOILS I Soils Mapped As: Drainage Class: Field Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth cinches) Horizon Matrix Color (Munsell Moistl 1a1123it Hydric Soil Indicators: Histosol �Y__Histic Epipedon _ Sultidic Odor _ Aquic Moisture Regime T Mottle Colors Mottle (Munsell Moist) (Abundance/Contrastl o,�y TextureConcretions, Structure, etc. cools--MNC,le- C.rim 1 Reducing Conditions _ Gleyed or Low Chroma Colors _ Concretions High Organic Content in Surface Layer in Sandy Soils Organic Streaking in Sandy Soils Listed on Local Hydric Soils List Listed on National Hydric Soils List Hydric Soils Present? No REMARKS: Basis for determination: \ Ow. 0V\&Z& WETLAND DETERMINATION Is this Sampling Point Within a Wetland? IYes. No INVESTIGATOR: Basis for determination: 1 /+ U . �� 1 1�a,I G�� wti��� ✓etc ROUTINE WETLAND DETERMINATION - DATA FORM Project/Site: -T=_= -. Sec: S plicant!C'wner: L r �l v� << Township: Investigator(s): M �� Range: ' Do Norm21 Circumstances exist on the site? (Yes No Is the site significantly & recently disturbed? (Atypical Situation) Yes �No Is the area a potential Problem Area? (explain in final remarks) Yes o' VEGETATION Dominant Plant Species % t \Stratum Indicator 2.Li���A^ 3.v©�V�. ��� 52.to►u►�. ��`! 4. 1987 MANUAL Date: e/7 County: - State: Washington Plot ID: C P - Z Transect ID: Community ID: 0nrn Qt Plant Species Stratum Indicator to S. 10. Percent of Dominant Species that are Hydrophytic Vegetation Present? oesNo - OBL, FACW or FAC (excluding FAC-) '5-3 % Basis for determination: b��{L(?Gv✓I ��' REMARKS: Sa {Q S•vj w, n, 6h ��-Lf "� �•-� fi � r� v� HYDROLOGY Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12' Aerial Photographs Saturated in Upper 12" Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deoosits Other (Explain in Remarks) Drainage Patterns in Wetlands Feld Observations Depth of Surface Water (in.) Depth to Free Water in Pit: j (in.) Depth to Saturated Soil: 12— (in.) Wetland Hydrology Present? es No REMARKS: Basis for determination: - +4 L� L`.. In UT) �2✓ ' ZI I !'� ��Q„� K^ ttitV-s/ SOILS II(-'y � �cra o✓� Soils Mapped As: S GIB fiAL4 t k- Drainage Class: Feld Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth (inchSsi Horizon Matrix Color SMunsell Moist) jo'jp'41' 1 . IayR3l'7-- Mottle Colors Mottle (Munsell Moist) (Abundance/Contrastl Au Ck. f tAU Sa4u,4, J Hydric Soil Indicators: Histosol _ Reducing Conditions _ Organic Streaking in Sandy Soils -y Histic Epipedon _ Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List Sulfidic Odor Concretions _ Listed on National Hydric Soils List Aquic Moisture Regime High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? Yes; No REMARKS: Basis for determination: F� 1 �'G 1 �G� o v� WETLAND DETERMINATION Is this Sampling Point Within a Wetland? Yes No INVESTIGATOR: Basis for determination: �,s ROUTINE WETLAND DETERMINATION - DATA FORM &'o'e ct/Site: C f' (� _ Sec:plicanVC'wner: C.1��+ n°�- I �{ : p.� (Co Township: 2 3 N Investigator(s):"j,r Range:. 5 { VACI-- c C,.,,,, Z L. 4 Do Normal Circumstances exist on the site? Yes. No Is the site significantly & recently disturbed? (Atypical Situation) Yes <kIo; Is the area a potential Problem Area? (explain in final remarks) Yes VEGETATION Dominant Plant Species Stratum Indicator yPltLae.q 4. RubUs pydcV-�,C4-5colg-. 1.1 Percent of Dominant Species that are OBL, FACW or FAC (excluding FAC-) REMARKS: A vSe-+,x -t t5 ai 'Fah as P , 6, HYDROLOGY Recorded Data (Describe in Remarks): Stream, Lake or Tide Gauge Aerial Photographs Other None 1987 MANUAL Date: 7,/q6 County: 6— State: Washington Plot ID: f-� P I Transect ID: Community ID: Defftinwit Plant Scecies Stratum Indicator 7,l_0v\y01u0tA,r7 '58 8. 10. Hydmphytic Vegetation Present? es No % Basis for determination: 5d % Low I— V PRIMARY Indicators Inundated Saturated in Upper 12" Water Marks Drift Lines Sediment Deposits Drainage Patterns in Wetlands Abf es 9V'0V%CZ-S SECONDARY Indicators Oxidized Root Channels in Upper 12" Water Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Feld Observations Depth of Surface Water. l" (in.) Depth to Free Water in Pit: -r (in.) Depth to Saturated Soil- in.) Wetland Hydrology Present? Yes. No REMARKS:. . Basis for determination: ` S1 SOILS // t Soils Mapped As: G I Crate MAAC Drainage Class: Field Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth anchesl Horizon Matrix Color (Munsell Moist) 1o`1ft 2%( Mottle Colors Mottle (Munsell Moist) (Abundance/Contrast) Texture Concretions. Structure. etc. WIULjC � �Crw �ilrPf'-�, J Hydric Soil Indicators: Histosol _ Reducing Conditions _ Organic Streaking in Sandy Soils -f,_ Histic Epipedon _ Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List Sulfidic Odor _ Concretions Listed on National Hydric Soils List Aquic Moisture Regime _ High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? es No REMARKS: Basis for determination: wS C 2� -------------------___---— - ------ a--------___________-------------------------------------- WETLAND DETERMINATION . Is this Sampling Point Within a Wetland? t Yes) No INVESTIGATOR: T' - Basis for determination: �i % ckla.iv\ e4evO lMay- - G' APPENDIX E Earthen Trench Plug TRENCH PLUG WITH SELECTED LOw PfRUCA&E. KOM&SPERSI&E CLAY MATERIA (MIN. PLASTICITY INDEX OF IOL COMPACTED TO 95X RELATIVE COMPACTION. SEE NOTE 1.-- l — TOP Of TRENCH to BACKFILL AS REQUIRED TRENCH`! ©oTTO)d i '✓3 .. I PIPE SEE NOTE J NOTES: 1. TRENCH PLUG SHALL BE KEYED INTO EACH SIDE AND BOTTOM OF TRENCH A MINIMUM Of 6. 2.. WHERE SUITABLE IMPERVIOUS MATERIAL IS NOT AVAILABLE. LEAN M/x CONCRETE MAr SE SUBSTiTUTEO. J. PROVIDE TRENCH PLUGS AT LOCATIONS AND INTERVALS SP.EC/nEQ EARTHEN TRENCH PLUG B Wetland Delineation Report Higate Sewage Lift Station Elimination. Renton, Washington Prepared for: AGRA Earth & Environmental and City of Renton December 1996 430 E N T R A N C O Wetland Delineation Report HIGATE SEWAGE LIFT STATION ELIMINATION Renton, Washington Prepared for AGRA Earth & Environmental 11335 NE 122nd Way, Suite 100 Kirkland, Washington 98034-6918 (206) 820-4669 and City of Renton 200 Mill Avenue South Renton, Washington 98055 (206) 277-6179 Prepared by ENTRANCO 10900 NE 8th Street, Suite 300 Bellevue, Washington 98004 (206) 454-5600 December 1996 CONTENTS INTRODUCTION BACKGROUND Page 1 1 FIELD INVESTIGATION METHODOLOGY 1 FIELD INVESTIGATION Field Data Results 8 10 Wetland Delineation Results 14 POTENTIAL WETLAND IMPACTS During Construction 14 During Operation 15 CONCEPTUAL MITIGATION 15 REFERENCES Published Documents 16 APPENDIX A - Wetland Map from Original Alignment B - Wetland Map from Surrounding Property C - Growing Season Table D - Completed Data Forms E - Earthen Trench Plug 96038 / Report / Wetlands (12/ta/96) / jc I FIGURES Page 1. Project Vicinity 2 2. Proposed New Sewer Line Corridor 3 3. NWI Wetlands in the Project Area 4 4 City Inventory Wetlands in the Project Area 5 5. Wetland Delineation Map 9 TABLES Page 1. Plant Status and Chance of Growing in a Wetland 6 2. Soils in the Project Area 7 96038 / Report / Wetlands (12/18196) / j II INTRODUCTION This wetlands investigation is for the proposed Higate Sewer Lift Station Elimination project, which is located in Section 5, Township 23 North, Range 5 East, W.M., and in the City of Renton (figure 1). The proposed new buried sewer line would be located in the northeastern quadrant of the intersection of Jones Avenue NE and NE 20th Street along a 15-foot-wide utility easement (figure 2). The investigation was performed to identify and to delineate the jurisdictional boundary of wetlands within 65 feet of the utility easement. BACKGROUND Two previous wetland studies have been conducted in the project vicinity. These studies were reviewed prior to conducting the current field investigation. The first study was prepared for the original alignment for proposed new sewer line (the original alignment was approximately 120 feet west of the current alignment along NE 20th Street). The results from this investigation indicated wetlands were along only the immediate creek channel and around the existing excavated pond (Appendix A, Phelps 1993). The second investigation was conducted for a private land owner who owns much of the property the proposed new sewer line will cross. The results from this investigation indicated that the wetlands extend across much of the creek valley (Appendix B, David Evans & Associates 1994). Maps from both the U.S. Fish and Wildlife Service National Wetland Inventory (USFWS NWI) and the City of Renton also were examined to see if these government agencies had identified any wetlands as occurring in the project vicinity. The NWI map (USFWS 1988) indicates a seasonally flooded, palustrine (freshwater) scrub -shrub wetland (PSSC, Cowardin et al 1979) in the project area (figure 3). This site corresponds to the blueberry farm immediately south of NE 20th Street and the existing sewage lift station (which is to be eliminated). The City of Renton's wetland map (Renton 1992) indicates a wetland in the same area, but shows the wetland extending north of NE 20th Street (figure 4). FIELD INVESTIGATION METHODOLOGY The wetland investigation was conducted using the "Routine On -site Determination Method" described in the Corps of Engineers Wetlands Delineation Manual (Environmental Laboratory 1987), as modified (Corps 1991 and 1992). For jurisdictional purposes, wetlands are defined by the U.S. Army Corps of Engineers (Corps) and Environmental Protection Agency (EPA) (Federal Register 1982 and 1980) as: 96038 / Report / Wetlands (12118196) / jc SCALE 1:24000 0 1 MILE 0 o. m 1000 0 1000 2000 3000 4000 5000 6000 7000 FEET v 7 m 3 1 .5 0 1 KILOMETER m WASHINGTON N CONTOUR INTERVAL 25 FEET m NATIONAL GEODETIC VERTICAL DATUM OF 1929 m rn = QUADRANGLE LOCATION 0 Higate Sewage Lift Station - Wetland Delineation Report 430 E N T R A N C O Figure 1 Project Vicinity N i 1Ld h Q OV � m to `^ E(�EMHuT 1 � � ,_A/B4• Z9E h .'lot3 soo ,✓8g • 24 E _ _ _ _ 53ryot lot 4 � � I I tot 1 loo T, 1 iZZ35�Z t, A/BS'/G •/aE /SS.D3 av Q 1 ti o 0 t' V � ue o0 1• If v � w NE 20th Street 430 E N T R A N C O Figure 2 Proposed New Sewer Line Corridor Kennydale eman Poin AMC A: J 2cx� 7 41 PF:on V1\ (t-7 er V; ? mc, . . . . . . . . . . kisB V�l V x 7.-tom L ot" Lip 0 q� -0" ;. e _BM 0 . . . . . . . . . . . . . . Z� X 14 pEM C M HigtioWetland Deli neatio n Reporn rt ate Sewage Lift Stan Figure 3 ENTRANCO NWI Wetlands in the Project Area May •_- 1 1 �1 N �v-� S 17 r V3K r— U , L V S-9 I y �1. C° W1K W4K V-3 S26K r W-23 S28K _ W 2 6 S —10 S 13 N.E. 27TH STREET 'GT ON . ` rr 1 .... 4 W- 29 Q S —1 1 �z---� NE 20th Street I i PROJECT LOCATION LJ A, a S —18 c_1 - Sr-', 6 a tCL FIGURE #3 J CITY OF RENTON 3 ` WETLANDS INVENTORY MAP — HAMMOND. COLLIER 3 WADE — LIVINGSTONE ASSOCIATES. INC. rn 0 �o m m Higate Sewage Lift StationWetlandDelineationReport m 430 ENTRAN CO Figure City Inventory Wetlands in the Project Area `Those areas that are inundated or saturated by surface or ground water at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs, and similar areas." The presence of the three essential wetland characteristics (i.e., wetland vegetation, soils, and hydrology) were examined by looking for positive indicators of each characteristic. Examination for wetland (hydrophytic) vegetation is done within different plant communities (i.e., communities that are composed of significantly different species of plants). Each plant community along the suspected wetland/non-wetland boundary is identified and described and a data point is selected in each different plant community. Plant species are identified around that data point for each different stratum (e.g., tree, sapling, shrub, and herb). The sampling area around the data point is a 30-foot radius for the tree stratum and a 5-foot radius for the sapling, shrub, and herb strata. Through visual estimating, the plants are given a percentage of coverage in each stratum sampling area. The dominant plants in each stratum are determined by selecting plants which have a coverage of 20 percent for each stratum. These plants are included on the list of dominant species. Plant species were identified using the Flora of the Pacific Northwest (Hitchcock and Cronquist 1973). Plants were further identified as to the estimated probability of their chance of occurring in wetland and non -wetland environments, based on the National List of Plant Species That Occur in Wetlands (Reed 1988a, 1988b, and 1993 and Corps 1994) as shown in table 1. Table 1 Plant Status and Chance of Growing in a Wetland Indicator Categories Symbol Estimated Probability Obligate Wetland OBL >99% Facultative Wetland FACW 67%-99% Facultative FAC 34%-66% Facultative Upland FACU 1 %-33% Obligate Upland UPL <1 % The dominant species and their indicator category for all strata are combined together to determine if the identified dominant vegetation meets the criteria that wetland plants 960381 Report / Wetlands (12/18196) 1 jc 6 comprise most of the plant community. In general, the criteria to meet the wetland vegetation requirements occurs when the dominant plants that have an OBL, FACW, and/or FAC indicator (see table 1) account for more than 50 percent of the total list of dominant species. When this "greater than 50 percent' threshold occurs, the data point is said to have a positive presence of wetland vegetation. In addition to the percent coverage method, there are other indicators for identifying wetland vegetation. If the plants are observed to be growing under saturated or inundated conditions during the growing season, regardless of the indicator status, the plants should be considered as acting like wetland plants. Morphological, physiological, and reproductive adaptation, and evidence from technical literature also are used to determine if the plant is acting as wetland vegetation. If there is strong evidence of these other indicators, the plant community should be said to have a positive presence of wetland vegetation. Examination for wetland (hydric) soils starts by digging a pit at the data point and assessing the soil characteristics. Indicators for hydric soils include: (1) organic soils; (2) histic epipedons; (3) sulfidic materials; (4) aquic or peraquic moisture regimes; (5) direct observation of reducing soil conditions; (6) gleyed, low chroma, and low chroma/ mottled mineral soils; (7) soils on the local or national hydric soils list (note: care must be taken here so as not to include remnant hydric soils); (8) iron and manganese concretions; and (9) coarse textured or sandy hydric soils that have high organic matter content in the surface margin, dark vertical streaks of organic matter in subsurface horizons, or an organic pan (i.e., wet spodosol, an organic layer "floating" underground at the water table). Mineral soils were examined using the Munsell Soil Color Charts (Kollmorgen 1988) and the soil characteristics of the project area were reviewed with the Soil Survey King County, Washington and King County Area Hydric Soils List (USDA Soil Conservation Service 1973 and 1989) for hydric soil indicators (table 2 and Appendix B). Soils with a hydric inclusion are soils that, for mapping purposes and constraints, can have small patches of wetland soils (hydric soils) included in the soil area. Table 2 Soils in the Project Area Soil Hydric Sym. Soil Name Slope Hydric Inclusion Inc Indianola loamy fine sand 4-15% no no Sm Shalcar muck 0-1 % yes n/a 96038 / Report / Wetlands (17J18/96) / jo 7 Examination for wetland hydrology starts by visually scanning across the site and in the soil pit, to check for indicators of wetland hydrology. These primary field indicators, in descending order of reliability, include: (1) visual observation of inundation; (2) visual observation of soil saturation in the upper 12 inches; (3) water marks; (4) drift lines; (5) water -borne sediment deposits; and (6) wetland drainage patterns. Secondary field indicators include evidence of: (1) oxidized root channels (rhizospheres) associated with living roots and rhizomes in the upper 12 inches; (2) water stained leaves; (3) local soil survey data; and (4) FAC-neutral test (note: Corps approval is required to use this test). The manual further defines the jurisdictional timing and duration of inundation and soil saturation to meet the hydrology criteria. Non -tidal areas that have a duration of inundation and/or soil saturation greater or equal to 5 percent of the growing season may have wetland hydrology. Sites with 12.5 percent or greater duration of the growing season are considered to have a positive presence for wetland hydrology. The growing season is defined as surface temperatures greater than 28 degrees Fahrenheit, for at least 50 percent of the year. The growing season for the site was determined as being 253 days long based on the USDA Soil Conservation Service (now the Natural Resources Conservation Service) Soil Survey for King County Area, Washington (USDA SCS 1973) (Appendix C). The 5 and 12.5 percentages translate into roughly 13 and 32 days, respectively. FIELD INVESTIGATION The field investigation was conducted on August 7 and 8, 1996. The weather during the field investigation was sunny and hot. Since the field examination occurred during the driest time of the year, professional judgment was used in some cases, to determine the presence of wetland hydrology. Nine data points were located on the site to look for positive indicators of the three essential wetland characteristics: wetland (hydrophytic) vegetation, wetland (hydric) soils, and wetland hydrology. Data gathered was used to determine the boundary of the project wetland. These data points correspond to the soil pits (SP) and were numbered SP1 through SP9 on pink survey flagging. Cross ditches over the utility easement were also labeled and flagged with pink survey tape. The data points are shown on figure 5, the completed data forms are attached as Appendix D. Soils colors were taken from wet samples unless noted otherwise. 96038 / Report / Wetlands (12/18/96) / jo 50' WETLAND BUFFER 80 40 0 80 160 _-L-L w 00 I I TT= 0 -: Sewer Construction Easement I I ti UU) "_L I / 1111: WETLAND All ?N (n LK C4 K '_'E w Q ------------- - . ............... .......... ........ .... .. .......... ................ .......... ............. ...... --------------- ..... ... ---- ------------- -------- ---- (D ---------- -­ Ird, t w I I I - pyr WETLAND w tj w 3 ---------- ----­------­-----­---­ . ............ --- 40 Higate Creek (w -as 4ft -wo G-W "a -I � Ill. Pond TT )00 — n,r�. w.., i I f I �'^�* i N ON —WE I LAND Blueberry Farm I,, q,,O 4 4) Il WETLAffDARr.AntLED FOR qNME F,,,I I I L MILT tOjSE !9TE Single -Family: Residences C/) Legen( r 0' Wetland Buffe I I I I L SP-1 04 Soil Pit LU AA1-1 z Wetland Flag Jones Avenue NE N __w Delineated Wetland Boundary �w Approximate Wetland Boundary 50' Buffer Zone Figure 5 430 E N T R A N C O Wetland Delineation Map Field Data Results Data Point 1. The data point is located in roughly the mid -point along the north/south leg of the new sewer line corridor, and in a scrub -shrub plant community dominated by hardhack (Spiraea douglash), lady fern (Athyrium filix-femina), giant horsetail (Equisetum telmateia), and Himalayan blackberry (Pubus procera). These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP1) was dug to a depth of 12 inches to look for positive indicators of hydric soils and wetland hydrology. Although the soil was organic (a hydric soil indicator), the soil color was still examined. The soil was determined to be a 10YR 2/1 color throughout the core. With the organic soil, hydric soils were considered to be present. The soil pit was saturated to the surface and free standing water was 6 inches below the surface. The wetland hydrology characteristic was considered to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 2. The data point is located south of Data Point 1 up a small knoll, and is in a scrub -shrub plant community dominated by Himalayan blackberry, giant horsetail, and hedge bindweed (Convolvulus sepium). Although not listed as a wetland plant, the blackberry is known to be a vigorous grower in seasonally flooded wetlands. In this case, the blackberry was considered to be acting as a wetland plant, based on the shallow water table. The positive presence of hydrophytic vegetation was assumed. A soil pit (SP2) was dug to a depth of 15 inches to look for positive indicators of hydric soils and wetland hydrology. The soil was organic (a hydric soil indicator) in the upper 6 inches and mineral below this. The soil color was examined in the sandy mineral soil and was determined to be a 10YR 3/2 color. A strong sulfidic odor was also present in the soil. With the 6-inch organic soil layer (histic epipedon) over the saturated sandy soil, hydric soils were considered to be present. The soil pit was saturated at 12 inches and free standing water occurred 15 inches below the surface. The typical groundwater level was assumed to be much higher at the beginning of the growing season (March). The wetland hydrology characteristic was considered to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 3. The data point is located west of Data Point 1, up on a slight mound. The data point is in a plant community dominated by red alder (Alnus rubra), giant horsetail, and Himalayan blackberry. These plants together indicate the presence of hydrophytic vegetation. 96038 1 Report I Wetlands (12118/96) / is 10 A soil pit (SP3) was dug to a depth of 18 inches to look for positive indicators of hydric soils and wetland hydrology. The soil has an organic layer (a hydric soil indicator) in the top 12 inches and a mineral soil below. The silty textured mineral soil was determined to be a 10YR 3/1, with mottles of a 10YR 4/4 color. With the organic soil layer (histic epipedon) over the low chroma, silty mineral soil, hydric soils were considered to be present. No water or saturation was observed in the soil pit. But due to the proximity and shallow elevation change from the surrounding area determined to be a wetland, the soil pit would be expected to be saturated within 12 inches of the surface, at the beginning of the growing season, for a sufficient duration to meet the jurisdictional hydrology requirements. The wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 4. The data point is in a disturbed plant community (i.e., front yard of a house and maintained as a lawn) just north of NE 20th Street, and is dominated by creeping buttercup (Ranunculus repens), velvet grass (Holcus lanatus), horsetail (Equisetum sp., likely telmateia), and unidentifiable grasses (due to the mowing). These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP4) was dug to a depth of 12 inches to look for positive indicators of hydric soils and wetland hydrology. Although the soil was organic throughout the core (a hydric soil indicator), the soil color was still examined. The soil was determined to be a 10YR 2/1 color in the upper 12 inches and 7.5YR 2/0 below that point in the core. With the organic soil, hydric soils were considered to be present. The soil pit was saturated to 4 inches from the surface and free standing water occurred 6 inches below the surface. The wetland hydrology characteristic was considered to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 5. The data point is located north of Data Point 1, next to a fallen and grown over barn. The data point is in a scrub -shrub plant community dominated by reed canarygrass (Phalaris arundinacea), giant horsetail, and Himalayan blackberry. These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP5) was dug to a depth of 18 inches to look for positive indicators of hydric soils and wetland hydrology. Although the upper part of the soil was organic (a hydric soil indicator), the soil color was still examined for the mineral soil below. The soil was determined to be a 10YR 3/2 color (dry) in the sandy/mucky soil from 0 to 7 inches. From 7 to 14 inches, the sandy loamy soil was determined to be a 10YR 5/2 color with 9W38 / Report / Wetlands (12/18/96) / jc 11 abundant mottles of both 7.5YR 4/4 and 7.5YR 5/6 colors. Below 14 inches, the soil was a 10YR 5/2 color with mainly 10YR 5/6 colored mottles. With the low chroma, mottled mineral soil, hydric soils were considered to be present. The soil pit was saturated to a depth of 14 inches below the surface, however, free standing water was not observed in the soil pit. Based on the depth of saturation (i.e., close to 12 inches below the surface) and time of year during the field investigation, the wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 6. The data point is just upslope to the north of Data Point 5 and is in a scrub -shrub plant community dominated by Himalayan blackberry, which by itself, does not indicate the presence of hydrophytic vegetation. A soil pit (SP6) was dug to a depth of 24 inches to look for positive indicators of hydric soils and wetland hydrology. The sandy mineral soil was determined to be a 10YR 3/2 color, with no mottles, from 0 to 10 inches deep, 10YR 4/4 from 10 to 24 inches deep, and 10YR 5/4, with some slight soil discoloration noticeable. With no hydric indicators observed in the mineral soils, hydric soils were not considered to be present. No indicators of wetland hydrology was observed in the soil pit or surrounding area. The wetland hydrology characteristic was not considered to be present. This data point was determined not to be a wetland since none of the essential wetland requirements were met. Data Point 7. The data point is located on the northern portion of the project, along the east/west leg of the new sewer line corridor in a scrub -shrub plant community dominated by Himalayan blackberry, giant horsetail, hardhack, and red alder. These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP7) was dug to a depth of 24 inches to look for positive indicators of hydric soils and wetland hydrology. The sandy mineral soil was determined to be a 10YR 3/1 (dry) color to 10 inches deep, and a 10YR 6/2 (dry) color, with abundant 7.5YR 4/6 mottles from 10 to 24 inches deep. With the low chroma, mottled mineral soil, hydric soils were considered to be present. No inundation or saturation was observed in the soil pit during the field investigation. However, based on the proximity and relative location in the topography to the creek, the site would likely have sufficient water during the beginning of the growing season to meet the hydrology criteria. With this in mind, the wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. 960381 Report / Wetlands (12/18/96) / jo 12 Data Point 8. The data point is located upslope from Data Point 7, and is in a scrub - shrub plant community dominated by Himalayan blackberry, salmonberry (Rubus spectabilis), and red alder. These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP8) was dug to a depth of 24 inches to look for positive indicators of hydric soils and wetland hydrology. All soil colors were determined using dry samples. The sandy mineral soil was determined to be a 10YR 2/1 color from 0 to 9 inches deep, 10YR 6/2.5, with very slight 10YR 5/6 mottles from 9 to 18 inches deep, and 10YR 6/2, with strong 10YR 4/6 mottles from 18 to 24 inches deep. Although slight, the mottling in the low chroma mineral soil appear sufficient to meet the wetland soils criteria. Hydric soils were considered to be present. No indicators of wetland hydrology were observed in the soil pit or surrounding area. Based on the proximity and higher elevation relative to the creek, the site would likely not have sufficient water during the beginning of the growing season to meet the hydrology criteria. The wetland hydrology characteristic was not considered to be present. This data point was determined not to be a wetland since only two of the essential wetland requirements were met. Data Point 9. The data point is located in the field (likely old pasture) north of the new sewer line corridor and west of the creek. The data point is in an emergent plant community dominated by reed canarygrass, giant horsetail, soft rush (Juncus effusus), creeping buttercup, and quackgrass (Agropyron repens). These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP9) was dug to a depth of 18 inches to look for positive indicators of hydric soils and wetland hydrology. All soil colors were determined using dry samples. The sandy mineral soil was determined to be a 10YR 3/2 color, with no mottles, from 0 to 9 inches deep, and a 10YR 5/2 color, with both 10YR 5/6 and 7.5YR 4/4 colored mottles from 9 though 18 inches deep. With the mottled, low chroma mineral soil, hydric soils were considered to be present. No inundation or saturation was observed in the soil pit during the field investigation. However, based on the proximity and position in the landscape relative to the creek, the site would likely have sufficient water during the beginning of the growing season to meet the hydrology criteria. With this in mind, the wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. 96038 / Report / Wetlands (12118/96) / jo 13 Wetland Delineation Results The wetland was flagged with blue survey tape and marked as assessment area AA-1 through AA-12 with in the project corridor. The wetland boundary outside of the corridor was visually estimated. The wetland is directly connected to the creek corridor and is fed by surrounding seeps in several locations. The entire wetland is estimated to be roughly 5-8 acres in size. Though historically used as a pasture, and now overgrown with blackberry and red alder, the wetland would meet the criteria as a Category 2, High Quality Wetlands, since the site is a headwater wetland (Renton 1992b). Category 2 wetlands require a standard buffer of 50 feet. The disturbed portion of the wetland (i.e., residence next to NE 20th Street), would, by itself, meet the criteria as a Category 3, Lower Quality Wetlands. This is based on the presence of fill for the house and garages. Category 3 wetlands require a standard buffer of 25 feet. However, since this area is connected to the main portion of the wetland, this disturbed area also would be considered a Category 2 wetland with a 50- foot buffer. The creek would have a buffer of 25 feet. Any activity in the wetlands may require permits from federal, state and city resource agencies. These permits may include: Permit/Approval/Review Resource Agency Section 404, Nationwide Permit U.S. Army Corps of Engineers Water Quality Modification Washington State Department of Ecology Hydraulic Project Approval (HPA) Washington State Department of Fish and Wildlife SEPA Review Wetland Permit City of Renton City of Renton POTENTIAL WETLAND IMPACTS Based on the most current plan set (11/1/95), the impacts to the wetland were estimated for activities during construction and during operation. Cumulative and secondary impacts are not addressed in this report, since the project details are not completed. Cumulative and secondary impacts, however, should be considered and included as part of the wetland mitigation plan preparation. During Construction Impacts during construction are those which may temporarily affect the wetland's vegetation, soils, and hydrology. The project utility corridor is 15 feet wide and the 96038 / Report / Wetlands (12118/96) / jc 14 construction easement corridor is approximately 15 feet wide. Construction for the new sewer line would likely affect all the wetlands in these corridors. The 30-foot-wide construction corridor would impact roughly 13,350 square feet of wetlands. The construction also would impact 6,600 square feet of wetland buffer area. Material storage is expected to occur outside of the wetlands. During Operation Impacts during operation are those which may permanently affect the wetland's vegetation, soils, and hydrology. No permanent impacts are anticipated for the proposed project. CONCEPTUAL MITIGATION As with impacts, mitigation can be for temporary impacts (construction) and permanent impacts (operation). Typically, temporary impacts to wetlands can be mitigated by restoring the site after construction. However, mitigation criteria set at the beginning of construction can minimize the impacts and aid in the wetlands recovery. Mitigation for temporary impacts, in no particular order, may include: • narrow the construction corridor to minimize the amounts of wetlands disturbed • protect large trees in the corridor and wetlands out of the corridor, with clearing limit fencing • cut the vegetation to leave short stems and roots for rapid regrowth • use log mats or geotech fabric and hogfuel to limit soil disruption • stockpile surplus soils away from wetlands • use earthen trench plugs periodically to avoid "piping" along new sewer line (refer to a typical detail in Appendix E). • maintain subsurface cross water flow, by using either a drainage blanket or pipes • discharge water pumped out of the construction trench to points outside of wetlands, possibly using the current sewer system, or do not drain the trench and 'Work in the wet" • construct only during dry weather and within the HPA fisheries window • separate and bypass flowing water in the ditches and creek from the construction trench 960381 Report / Wellanda (12/18/96) / jc 15 reuse existing hydric soils and reshape the landscape to pre -construction conditions e revegetate the disturbed wetland and buffer with native plant species. maintain and monitor the revegetated areas to assure adequate establishment of the native vegetation Mitigation for permanent impacts may need to follow the criteria in the Wetland Management Ordinance (Renton 1992b) to compensate for any permanent loss of wetlands. Mitigation can be creation of new wetlands from upland areas or restoration of degraded wetland areas. In case there were to be impacts to the wetlands, the Category 2, scrub -shrub wetlands permanently affected would need to be compensated at a 2:1 ratio. Wetland buffers permanently lost also would require mitigation. If needed, a potential mitigation site could be the reed canarygrass dominated wetland plant community along the new sewer line corridor. This site is located just north of the lot along NE 20th Street. Mitigation at this location could be in the form of a wetlands restoration effort. If permanent impacts were to occur, a mitigation report and plan would need to be created when specific impacts are determined. A mitigation report would contain the environmental goals and objectives, performance standards, wetland construction plans, monitoring plans, and a contingency plan for the mitigation effort. However, with no permanent impacts anticipated for the project, no creation mitigation for replacement wetlands is expected. REFERENCES Published Documents Adamus, Paul R., Ellis J. Clairain, R. Daniel Smith and Richard E. Young 1987 Wetland Evaluation Technique (WET); Volume II: Methodology, Operational Draft Technical Report Y-87 U.S. Army Corps of Engineers Waterways Experiment Station, Vicksburg, MS. Cowardin, Lewis M., Virginia Carter, Francis C. Golet and Edward T. LaRoe 1979 Classification of Wetlands and Deepwater Habitats of the United States. Prepared for the Office of Biological Services, Fish and Wildlife Services, U.S. Department of Interior, Washington DC, FWS/OBS-79/31. David Evans and Associates 1994 Wetland Delineation Letter. Prepared for private landowner. 96038 I Report I Wetlands (12118/96) I jc 16 Environmental Laboratory 1987 Corps of Engineers Wetland Delineation Manual (1987 Manual). Technical Report Y-87-1, U.S. Army Engineers Waterways Experiment Station, Vicksburg, Mississippi. Federal Register 1991 33 CFR Part 330: Nationwide Permit Program Regulations and Issue, Reissue, and Modify Nationwide Permits; Final Rule. Part III Department of Defense, Corps of Engineers, Department of the Army, Vol. 56, No. 226, US Government Printing Office, Washington, D.C. November 22. 1982 Title 33: Navigation and Navigable Waters; Chapter II, Regulatory Programs Corps of Engineers., Vol. 47, No. 138, p. 31810, US Government Printing Office, Washington, D.C. 1980 40 CFR Part 230: Section 404(b)(1) Guidelines for Specification if Disposal Sites for Dredged or Fill Material, Vol. 45, No. 249, pp. 85352-85353, US Government Printing Office, Washington, D.C. Hitchcock, Leo C. and Arthur Cronquist 1973 Flora of the Pacific Northwest: An Illustrated Manual. University of Washington Press. 1990 edition. Kollmorgen Instruments Corporation 1988 Munsell Soil Color Charts. Baltimore, MD. Kunze, Linda M. 1987 Puget Trough Freshwater Wetlands, A summary of Biologically Significant Sites, Phase II: Southern Puget Trough Impounded Wetlands. Washington Natural Heritage Program. Prepared for the Washington State Department of Ecology. Phelps, Marilyn (Cascade Environmental Services) 1993 Wetland Delineation Report. Prepared for City of Renton. Puget Sound Water Quality Authority (PSWQA) 1994 Puget Sound Water Quality Management Plan Reed, Porter B., Jr. 1993 1993 Supplement to the List of Plant Species that Occur in Wetlands: Northwest (Region 9). U.S. Fish and Wildlife Service. 1988a National List of Plant Species that Occur in Wetlands: National Summary. U.S. Fish and Wildlife Service, Biological Report 88(24). 1988b National List of Plant Species that Occur in Wetlands: Northwest (Region 9). U.S. Fish and Wildlife Service, Biological Report 88(26.9). 9W39 i Report, wetlands (iviares) i jc 17 Renton, City of 1992 Critical Areas Inventory Maps. Prepared with assistance from Jones and Stokes, and R.W. Beck. 1992b Wetland Management Ordinance. Chapter 32. U.S. Fish and Wildlife Service 1988 Mercer Island Quadrangle, National Wetland Inventory. U.S. Army Corps of Engineers (Corps) 1994 1993 Supplement to National List of Plant Species that Occur in Wetlands: Northwest (Region 9). March 31. 1992 Clarification and Interpretation of the 1987 Manual. Guidance memorandum. March 6. 1991 Questions & Answers on 1987 Corps of Engineers Manual. Guidance memorandum. October 7. 1990 Permit Requirements for Wetland Fill Projects. Information Paper. Seattle District. April 17. USDA Forest Service 1985 Management of Wildlife and Fish Habitats in Forests of Western Oregon and Washington, Part 1 - Chapter Narratives. Pacific Northwest Region. Published in cooperation with the U.S. Department of the Interior, Bureau of Land Management. USDA Soil Conservation Service 1989 King County Area Hydric Soil List. 1973 Soil Survey of King County Area Washington. Washington Natural Heritage Program (NHP) 1994 Endangered, threatened and sensitive vascular plants of Washington. Department of Natural Resources, Olympia. Washington State Department of Ecology 1993 Wetland Rating System. 96038 / Report I Wetlands (12/18I96) I is 18 APPENDIX A Wetland Map from Original Alignment Y III 12l' WETLAND #2 ' A REA ADJACENT �oj '„ TO EXISTING 1 I A, t 77 1; t I� 112. //. .s POND ( 136 _ •1,Q11.7. . 6 . I • • . ,jv►T-.�-a_.2a „ +1 137 .eo 204 26- Zj% `1GeS 1 s � !t°s i' - .•v'� _ � ��a!�.� a ` ._ - -.�-ter• i �. 0• i ,tN I 129 •. I37 //` '1r�� _ I 13B wbl7 206 7oa `\ss,i� 210Ism 1 LIr I SH na •11• i ilea 70 269 .I>0 U1 Iis ` 13 ; Inv177`'`� t• `107 lip �m j . L : ((/ A, 270 a 1 1•IW.1Z �lA i '(.�t� _ 3aL�.. 1aa m A� ` 220 ,22Ae 2 �• 2 •ni I o y 1 71a . ' 226 30• •�' 2y 397. 1 �1 2.1 a :ss psy L r T1- 25Z, Ss•Y2 �1, d• _L - zYz 7 i ; ( /a�9�'ad9 :» p SCALE 1 = 80 FEET 31 1 , 1 S W Z I .� '� + �'•' all /i . . W ,l7 jj1a y—� 1a �9 Q I (f 1 m i u I I „4 w p WETLAND #3 1 24,3 i T\ SMALL DITCH TRIBUTARY TOE, Ea2a f CREK � L � . , . -, .: 324 ass �axl I P9•=AR$ rz-+ y j 32 ' • / �S �CAA25%g3 It, POHL RESIDENCE �_.......... _ .- s an n � �(. 370 aes I 3. 1 \� } i ,,, 11 376 1 sn I/f MRw t I LARGE PASTURE >a soy am . v •. GL III To h'•tl' � I WETLAND #1 EAST BANK OF CREEK, NORTH OF . KAY RESIDENCE Gao .-- II 1 , i31 ,,.. DR. KAY'S PROPERTY % T W I 'j a62 laea� i432 +.•� 0r/r�1 363 '..363 I I 1. b0 1'.- M7 7 = i .. NOM2 Ya • a .17 `ll 7 6- - — !�_��iL�_�7061i_ tS 7an N. E 20TH STREET �— _ . 1• y3� =_ yes .. _ a:i ..,.... _154--- FIGURE #4 ;tea •:a..4. ; 7 .J9 -�_.. .23 �< .916. - 97 PI �� 447 .96 PROJECT AREA I SURVEY MAP EXISTING BERRY FARM HAMMOND, COLLIER & WADE - LIVINGSTONE ASSO CIATES, INC.�__ APPENDIX B Wetland Map from Surrounding Property 11 zl lJ G � ;• • 1 J, /34 ,—..rr•�m{mom � .. N--.•-- � - L - � _ . -.-.. �� � _ ^�.— �. - 1, APPENDIX C Growing Season Table TABLE 10.—PROBABILITY OF FREEZING TEMPERATURES AFTER Station. Temperature Probability in spring 90 75 50 25 10 percent percent percent percent percent 0- Bothell 2 N. 32 Apr. 18 Apr. 30 May 13 May 27 June 7 (elevation 100 feet) 28 Mar. 19 Mar. 30 Apr. 13 Apr. 27 May 8 24 Feb. 7 Feb. 21 Mar. 8 Mar. 21 Apr. 2 Cedar Lake 32 Mar. 21 Apr. 2 Apr. 15 Apr. 28 May 11 (elevation 1,560 feet) 28 Feb. 11 Mar. 1 Mar. 16 Mar. 30 Apr. 11 24 (i/) Jan. 29 Feb. 14 Mar. 1 Mar. 15 randsburg 32 Apr. 15 Apr. 27 May 10 May 24 June 4 (elevation 535 feet) 28 Mar. 4 mar. 16 Mar. 29 Apr. 11 Apr. 24 24 Jan. 8 Feb. 4 Feb. 19 Mar. 5 Mar. 18 Monroe 2 WSW. 32 Mar. 21 Apr. 3 Apr. 16 Apr. 30 May 12 (elevation 120 feet) 28 Feb. 21 Mar. 5 Mar. 19 Apr. 1 Apr. 14 24 Jan. 28 Feb. 17 Mar. 6 Mar. 17 Seattle -Tacoma Airport 32 Mar. 15 Mar. 27 Apr. 9 Apr. 23 May 4 386 28_ Feb. 5 Feb. 23 Mar. 9 Mar. 23 Apr. 4_ _(_P_1evation -feet)__ 18 Feb. 9 _ Feb. 25 _ Mar• 9 Seattle University of Washington 32 Feb. 26 Mar. 10 Mar. 23 Apr. 6 Apr. 17 (elevation 113 feet) 28 Jan. 10 Feb. 2 Feb. 17 Mar. 2 24 (L/) Jan. 17 Feb. 6 Feb. 19 Snoqualmie Falls 32 Apr. 11 Apr. 23 May 6 May 20 June 1 (elevation 430 feet) 28 Mar. 6 Mar. 18 Apr. 1 Apr. 14 Apr. 27 24 (L/) Feb. 8 Feb. 24 Mar. 10 Mar. 23 Vashon Island 32 Mar. 10 Mar. 23 Apr. 5 Apr. 18 May 1 (elevation 231 feet) 28 Jan. 14 Feb. 7 Feb. 23 Mar. 8 Max. 21 24 Jan. 21 Feb. 9 Feb. 24 J Not reported. 90 fi SPECIFIED DATES IN SPRING AND BEFORE SPECIFIED DATES IN FALL Probability in fall Period between last occurrence in spring and 10 25 50 75 90 percent percent percent percent percent first in fall Days Sept. 12 Sept. 23 Oct. 5 Oct. 17 Oct. 28 145 Oct. 7 Oct. 18 Oct. 30 Nov. 11 Nov. 22 200 Oct. 22 Nov. 2 Nov. 15 Dec. 1 252 Oct. 10 Oct. 21 Nov. 2 Nov. 14 Nov. 25 201 Oct. 29 Nov. 9 Nov. 22 Dec. 5 Dec. 27 251 Nov. 13 Nov. 25 Dec. 10 (�J) (1) �99 Sept. 21 Oct. 1 Oct. 14 Oct. 26 Nov. 6 157 Oct. 21 Nov. 1 Nov. 13 Nov. 25 Dec. 6 229 Nov. 7 Nov. 19 Dec. 2 Dec. 21 (i/) 286 Sept. 30 Oct. 11 Oct. 25 Nov. 4 Nov. 15 190 Oct. 22 Nov. 1 Nov. 13 Nov. 26 239 Nov. 2 Nov. 14 Nov. 27 Dec. 13 T) 283 Oct. 10 Oct. 21 Nov. 2 Nov. 15 Nov. 25 207 Oct. 26 Nov. 5 Nov. 17 Dec. 2 Dec. 16 _�3. Nov. 20 Dec. 5 (1 ) 1 ) 1 ) 3�5_ Oct. 26 Nov. 6 Nov. 18 Dec. 1 Dec: 11 240 Nov. 21 Dec. 1. Dec. 18 319 Dec. 3 Dec. 19 (i/) (J) T) 348 Sept. 16 Sept. 27 Oct. 9 Oct. 21 Nov. 1 156 Oct. 16 Oct. 27 Nov. 8 Nov. 20 Dec. 1 221 Nov. 8 Nov. 19 Dec. 2 Dec. 19 (i/) 281 Oct. 15 Oct. 26 Nov. 7 Nov. 19 Nov. 30 216 Nov. 18 Nov. 24 Dec. 9 Dec. 31 289 Dec. 2 Dec. 16 Dec. 31 T) 344 91 468-266 0 - 73 - 6 APPENDIX D Completed Data Forms ROUTINE WETLAND DETERMINATION - DATA FORM Project/Site: lica riwner: rnestigator(s): Do Normal Circumstances exist on the site? Is the site significantly & recently disturbed? (Atypical Situation) Is the area a potential Problem Area? (explain in final remarks) VEGETATION Dominant Plant Species Stratum Indicator U s. 2t t Percent of Dominant Species that are OBL. FACW or FAC (excluding FAG-) % 1987 MANUAL Sec: S Date: Township:2Zry County: fh/h Range: State: Washington (Yes No Plot ID: c, i Yes rNo-) Transect ID: ' Community ID: Yes (-Roo 8.=i%UJO �jc��5L,�li�. 9. 10. — Hydrophytic Vegetation Present? des No Basis for determination: S'D B., live.. 1!• ;4 4J REMARKS: v-Ob 0 .f)" HYDROLOGY II Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12" Aerial Photographs Saturated in Upper 12' Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAG -Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Field Observations Depth of Surface Water. IV(in.) Depth to Free Water in Pit:_(in.) Depth to Saturated Sol:_(in.) Wetland Hydrology Present? Yes' No Basis for determination: <� REMARKS: O `J�- V SOILS Soils Mapped As: 1 VA ill cry01a I blcAv\�'k^ Drainage Class: Feld Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color . Mottle Colors Mottle finchesl Horizon (Munsell Moistl (Munsell Moistl (Abundance/Contrast)Texture. Concretions. Structure. etc. 0—'ci --� Hydric Soil Indicators: _ Histosol Reducing Conditions _ Organic Streaking in Sandy Soils _ Histic Epipedon Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List _ SuHidic Odor Concretions Listed on National Hydric Soils List _ Aquic Moisture Regime _ High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? Ye No REMARKS: Basis for determination: �jLJ G� ✓ova WETLAND DETERMINATION�j Is this Sampling Point Within a Wetland? ,Ye i No INVESTIGATOR: Basis for determination: ROUTINE WETLAND DETERMINATION - DATA FORM 1987 MANUAL Pro' ite: ff =f u Sec: :> Date: lica t'wner: �.i n �/ Townshi 2' N Count ►' i�'�/►- P P Y gator(s): •l ' 7 r �/ Range: State: Washington Do Normal Circumstances exist on the site? ;'Y s No Plot ID: r Is the site significantly & recently disturbed? (Atypical Situation) Yes .NoTransect ID: Is the area a potential Problem Area? (explain in final remarks) Yes : N& Community ID: VEGETATION L Dominant Plant Species Stratum Indicator IoNft Plant Species Stratum Indicator 6. �eV+�'Givt� �G�'�+'�'�''a � A 2. _ 5 W � � - FAC. 7. 4u.,L Mazy rk-\\0w� 3. U .tih VkA 6v C. I 8. Sit 11 % U S)'Z4'q {{ 4. 9. Gott G A(, FA-6 C s. 10fo u� � •. �r� a 1(�tS _ Percent of Dominant Species that are rr Hydrophytic Vegetation Present? 'Yes No OBL, FACW or FAC (excluding FAG-) (1o,�,7 % Basis for determination: Q e/ j �^ � REMARKS: IAb q ) n� dvv, J P HYDROLOGY Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12" Aerial Photographs Saturated in Upper 12' Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Field Observations Depth of Surface Water. r� '�. (in.) Depth to Free Water in Ph: (in.) Depth to Saturated Soii:_(in.) Wetland Hydrology Present? Yes .No.! REMARKS: Basis for determination: SOILS Q Soils Mapped As: y1 �C.� o�A x DU+tnt� tv�2 Drainage Class: Feld Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon 6 9 . G 0 11 1` � t�+ ,t Matrix Color . Mottle Colors (Munsell Mois`tl IMunsell Moist) Io`f IL �� 6„��3 loy I251h Io�I /2Li- Ll%A Hydric Soil Indicators: _ Histosol Histic Epipedon _ SuKidic Odor _ Aquic Moisture Regime sllgy,�-- 5-firo q Texture Concretions. Structure. etc. J Ct LA 1.1 � Reducing Conditions Organic Streaking in Sandy Soils 61s44 Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List _ Concretions _ Listed on National Hydric Soils List High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? Ye No REMARKS: �u W Basis for determination:(. -"A) WETLAND DETERMINATION AlIs this Sampling Point Within a Wetland? Yes to INVESTIGATOR:/ " 4% ' l/ Basis for determination: V, �� 1G VS ple-,evt-1- ROUTINE WETLAND DETERMINATION - DATA FORM Project/She: Sec: Applicant/C'wner: Township: ? �N Investigator(s): /-1.-, -t. Range: I Do Normal Circumstances exist on the site? No Is the site signficantly & recently disturbed? (Atypical Situation) Yes ,0 Is the area a potential Problem Area? (explain in final remarks) Yes o VEGETATION Dominant Plant Species Stratum Indicator 1. 10✓ _�4LLj 2. u-r4, T -4 3. - p ir' 0v`a UZ-11 5. Percent of Dominant Species that are OBL, FACW or FAC (excluding FAC-) �% REMARKS: NC4 v S+dA IK 1987 MANUAL Date: County: State: Washington Plot ID: "-7 Transect ID: Community ID: 4ACa t Plant . pecies Stratum Indicator 6. F1 LAS.. I j FAQJ 10. it Xel,U- J0 Imo; JA f - � c -�. HyEfrop �t� egetation rF esent?' e � No F Basis for deter Ration:o70 W L V40 . `I�t�P.wc.P �- 4J�u-'iev-�•IQ -%0 ��.�' �� ��tJ �� �n HYDROLOGY V`� *A4 `w1`zFARA Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12" Aerial Photographs Saturated in Upper 12- Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Feld Observations II )1 Depth of Surface Water.(in.) Depth to Free Water in Ph: (in.) Depth to Saturated Soil: 72q (in.) Wetland Hydrology Present? - es No Basis for determination: �, Ai _ J- i REMARKS: D i h Ste; SOILS (� V Soils Mapped As: 1 a I'a L me 1 Q A � 4 . -Ne— Sa'nA- Drainage Class: Field Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth fiches) ii4IlzoQ 0-10 o _:w% Matrix Color . Mottle Colors (Munsell Moist)t, (Munsell Moist) o� (2 3/ clEv �► �I�t. l Ska-,o vtvv, J ' Hydric Soil Indicators: Histosol Reducing Conditions _ Organic Streaking in Sandy Soils _ Histic Epipedon Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List Sutfidic Odor Concretions Listed on National Hydric Soils List _ Aquic Moisture Regime _ High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? Yes V No REMARKS: /,h 6tb Basis for determination: CSIy �4t ✓Ova VJ Jvl _ WETLAND DETERMINATION Is this Sampling Point Within a Wetland? ce No INVESTIGATOR: Basis for determination: ROUTINE WETLAND DETERMINATION - DATA FORM Project/Site: et:. ApplicanUC'wner: h . Invesfigator(s): Do. Normal Circumstances exist on the site? Is the site significantly & recently disturbed? (Atypical Situation) Is the area a potential Problem Area? (explain in final remarks) VEGETATION Dominant Plant Species Stratum Indicator 2. 3. 4. 61 Percent of Dominant Species that are OBL, FACW or FAC (excluding FAG) REMARKS: ' .e—I HYDROLOGY Recorded Data (Describe in Remarks) Stream, Lake or Tide Gauge Aerial Photographs Other None Sec: Township:` 2 Range: ZE Yes No Yes 2!No 1987 MANUAL Date: County: State: Washin g ton Plot ID: -sp Transect ID: Community ID: 9• LS_ -1 . - 11 0- -' - 6. 8. 10. Hydrophytic Vegetation Present? Yes e> Basis for determination: v10 6.✓s PRIMARY Indicators SECONDARY Indicators Inundated Oxidized Root Channels in Upper 12" Saturated in Upper 12' Water Stained Leaves Water Marks Local Soil Survey Data Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Feld Observations Depth of Surface Water. L&LOn.) Depth to Free Water in Pit: � (in.) Depth to Saturated Soil: '> 4- (in.) Wetland Hydrology Present? Yes No REMARKS: Basis for determination: SOILS j Soils Mapped As: n'j-u 0a w4i-"e Sah'j Drainage Class: Feld Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moistl o lob 5A. Mottle Colors (Munsell Moistl ►., -• 1•-1�' . 1 -7 4.i.s (610r.A'+1orl Texture Concretions. Structure. etc. V-e/ LA �r.� u vim. SG �_ Hydric Soil Indicators: Histosol _ Reducing Conditions — Organic Streaking in Sandy Soils Histic Epipedon _ Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List Sulfidic Odor Concretions _ Listed on National Hydric Soils List _ Aquic Moisture Regime _ High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present. Yes (No.; REMARKS: Basis for determination: W6— �tk C'A"s-- WETLAND DETERMINATION ' Is this Sampling Point Within a Wetland? Yes e n � INVESTIGATOR: Basis for determination: `w e+\ 0,1c1 1AA t Cc1y s ROUTINE WETLAND DETERMINATION - DATA FORM Project/Site: ki �1/4i .pplicant/Gwner: Investlgator(s): v Do Normal Circumstances exist on the site? Is the site significantly & recently disturbed? (Atypical Situation) Is the area a potential Problem Area? (explain in final remarks) VEGETATION r%�- i / jW Dominant Plant Species Stratum Indicator 1. 2. 1 bps P�CC.-IC.t 1 P/Iua 3. �qLA th �jv"n4 iI 61 Percent of Dominant Species that are OBL, FACW or FAC (excluding FAG) REMARKS: 0 Sec: Township: 7 � Range: (Yes) No `Yes %Noi ✓^' . 1987 MANUAL Date: &f X /G/(, County: /' - State: Washington Plot ID: TransectlD: Community ID: s. C+A7y%VC A 1,J 7. -- 8. 9. 10. Hydrophytic Vegetation Present? � es No � % Basis for determination: QeA c0001%A avml-o c�las� HYDROLOGY 1-1 Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12" Aerial Photographs Saturated in Upper 12' Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Feld Observations ` if I/ Depth of Surface Water. N/ -- (in.) Depth to Free Water in Pit: 7 _(in.) Wetland Hydrology Present? •Yes1 No REMARKS: SoYt sq•f •• '4 Basis for determination: � / j "- SOIsLMapped As: � �)� 'Vl �I..E.. �ho1 C�- �OU Drainage Class: • Field Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color . Mottle Colors Mottle (inched Horizon (Munsell Moist) (Munsell Moist) (Abundance/Contrast) Texture Concretions. Structure, etc. —I�-tI(7�/i�51Z ?r:5y2sr� l 1�i.�n�r �l�•�' U�Q "l�p,+nG1�-,. //tsCrA�Ac.�. Hydric Soil Indicators: Histosol Histic Epipedon —L Sulfidic Odor Aquic Moisture Regime v Reducing Conditions _ Organic Streaking in Sandy Soils Gleyed or Low Chroma Colors — Listed on Local Hydric Soils List "x Concretions _ Listed on National Hydric Soils List High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? Q s No REMARKS: `^� :�, ;• �>>.` `�-c. Basis for determination: DI 4V VN � l PAo f WETLAND DETERMINATION Is this Sampling Point Within a Wetland? CYes No INVESTIGATOR: Basis for determination: vm `' ROUTINE -WETLAND DETERMINATION - DATA FORM 1987 MANUAL Project/Site: IL- i !?'O'j Sec: Date: Applicant/C'wner: ' \-' Township: County: Investigator(s): /M <r� Range: T - State: Washington . / j Do Normal Circumstances exist on the site? Ce s.. No Plot ID: P 4. Is the site significantly & recently disturbed? (Atypical Situation) Cye-sD No Transect ID: Is the area a potential Problem Area? (explain in final remarks) Yes too Community ID: VEGETATION Dominant Plant Soecies Stratum Indicator Dominant Plant Species Stratum Indicator 6. 2. �dIC.uS 1�� LA 7. .a.r- 4. �1rOt/�/'- 9. 5. 10. Percent of Dominant Species that are Hydmphytic Vegetation Present? es No OBL, FACW or FAC (excluding FAC-) % Basis for determination: REMARKS:e-C:l '1r�.�-P �Q'►ti. lOVS,e-4 JJtx l�kd _rw� HYDROLOGY Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12' Aerial Photographs K Saturated in Upper 12' Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Field Observations � r_� ) I / / El Depth of Surface Water. Nr-- (in.) Depth to Free Water in Pit: l -L (in.) Depth to Saturated Soil: T (in.) Wetland Hydrology Present? `Yes No REMARKS: sa ►_ ! Mp, s fi,"_ t w�0 3 JOa/a Basis for determination: SOILS t' ,Soils Mapped As: SL, ct I ct.,,, /'►NN G k- Drainage Class: Field Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Cinches) 1iortmn Iz >IZ Matrix Color (Munsell Moist) 10� R-2/I 7.5 P o Hydric Soil Indicators: Histosol Histic Epipedon Sutfidic Odor Aquic Moisture Regime Hydric Soils Present? Yes? No Basis for determination: Reducing Conditions _ Organic Streaking in Sandy Soils Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List Concretions Listed on National Hydric Soils List High Organic Content in Surface Layer in Sandy Soils REMARKS: P ' WETLAND DETERMINATION Is this Sampling Point Within a Wetland? es No INVESTIGATOR: Basis for determination: 4Y ROUTINE WETLAND DETERMINATION - DATA FORM 1987 MANUAL Pro)ec?(Site: Sec: Date: (/ plicaritf�wner: - •, -#,, Township: -1 r� County: tl Invesfor(s): M Range: k: State: Washington Do Normal Circumstances exist on the site? EIS No Plot ID: 3 Is the site significantly & recently disturbed? (Atypical Situation) Yes (-N� Transect ID: Is the area a potential Problem Area?,(explain in final remarks) Yes (!�,o) Community ID: VEGETATION 5� . Dominant Plant Species Stratum Indicator r min nTPlanr Species Stratum Indicator .`� 1.�1n+E, ►r uh✓r�� 6. w 2 vX&CL+el e,, 7. 064�IA-,A Ck 4At for L' ! 3.""S d1�S��ad �`£ 8,1fs1/l VO�V k��SP t t71nn- �ly�tn� / 4. 9.Sovbv� %I.0 a..pe4',41 S. 10. Percent of Dominant Species that are OBL, FACW. or FAC (excluding FAG) REMARKS:7. HYDROLOGY ---v' .:;-;Recorded Data (Describe in Remarks): Stream, Lake or Tide Gauge Aerial Photographs Other None Hydrophytic Vegetation Present? - Yes No �_"/o Basis for determination: c va PRIMARY Indicators Inundated Saturated in Upper 12' Water Marks Drift Lines Sediment Deposits Drainage Patterns in Wetlands SECONDARY Indicators Oxidized Root Channels in Upper 12' Water Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Feld Observations Depth of Surface Water- NA (in.) Depth to Free Water in Pit: � �� (in. Wetland Hydrology Present? ('Yes) No REMARKS: d Basis for determination: i 1) t11k Depth to Saturated Sol: (in.) SOILS II Soils Mapped As: G [C- Drainage Class: Feld Observations = > Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizo Matrix Color (Munsell Moist) i0�-1 P z(. 1 J�l I2 3/' 1 Hydric Soil Indicators: Histosol :5t,Histic Epipedon _ SuNidic Odor Aquic Moisture Regime Mottle Colors Mottle (Munsell Moist) (Abundance/Contrast) o� y Texture- Concretions. Structure. etc. %v1ols- ML4'GIc- (A" ) .J Reducing Conditions `;` ; .; _ Organic Streaking in Sandy Soils 7- Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List Concretions Listed on National Hydric Soils List High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? tY No REMARKS: Basis for determination: �oW- WETLAND DETERMINATION Is this Sampling Point Within a Wetland? + es. No INVESTIGATOR: Basis for determination: 1 1 _.1_ % . ROUTINE WETLAND DETERMINATION - DATA FORM Project/Site: rt, <i rn 7 ` - Sec: S �plicant/C'wner: C r { �! vim... <« , Township: Investigator(s): Range: ` Do Normal Circumstances exist on the site? Yes! No Is the site significantly & recently disturbed? (Atypical Situation) Yes iVo Is the area a potential Problem Area? (explain in final remarks) Yes O VEGETATION Dominant Plant Species / Stratum Indicator 1. R %us rftAA 2. 3. C"V D I V N. 0 V� SZw, u,,, 4. 1987 MANUAL Date: 0/7-M6 County: L' State: Washington Plot ID: C P - Z TransectlD: Community ID: V4minant Plant Species Stratum Indicator 6. POA'-J-? 7. 9. S. 10. Percent of Dominant Species that are Hydrophytic Vegetation Present? es No 4 OBL. FACW or FAC (excluding FAC-) 3-3 % Basis for determination: b(&gCb&*- S-j � .►' ai tkv►,,��- REMARKS: HYDROLOGY Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12' Aerial Photographs Saturated in Upper 12" Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Feld Observations Depth of Surface Water. (in.) Depth to Free Water in Pit: j (in.) Depth to Saturated Soil: 1 (in.) Wetland Hydrology Present?a"+, esNo REMARKS: Basis for determination:to UIJ 2✓SOILS� Per-I✓aw.cJ �trAov` Soils Mapped As: GIB G-y (Mu tk— Drainage Class: Field Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color . Mottle Colors Mottle (inches) Horizon (Munsell Moist) (Munsell Moist) (Abundance/Contrast) Texture Concretions. Structure, etc. (0 t2� la`I R 31� n� de�e�d�. �Sa„�i.�, So;' � �t�l►� Sa�,u��.: • J Hydric Soil Indicators: Histosol _ Reducing Conditions _ Organic Streaking in Sandy Soils -y Histic Epipedon _ Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List —+� Sultidic Odor Concretions Listed on National Hydric Soils List _ Aquic Moisture Regime High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? Yes; No REMARKS: Basis for determination: f WETLAND DETERMINATION Is this Sampling Point Within a Wetland? Yes No., INVESTIGATOR: Basis for determination: *. ROUTINE WETLAND DETERMINATION - DATA FORM 1987 MANUAL Project/Site: H 6,1 (:— Sec: 5 Date: �/! h b �pplican Owner: 07�4 0; 1 t- - f•Jt CN Township 7-3y " County: rS— Invesltg o� at r(s): �: "_� Range: 5 State:Washington C� C( ���. 2 oti. 4- 75774 4IJ �C_5 �vt cti 1 (y.: Do Normal Circumstances exist on the site? Yes. No Plot ID: P Is the site significantly & recently disturbed? (Atypical Situation) Yes Flo; Transect ID: Is the area a potential Problem Area? (explain in final remarks) Yes C�J Community ID: VEGETATIONDominant Plant Species Stratum fndicatgl Demirn� Plant Species Stratum Indicato-r 1. SypltLae.� c�owtak�r..� 5� _�� 2. �.LLL(_ 3. �t5 -�—el►'�El G—F 4. T4UbuS 5. Percent of Dominant Species that are OBL, FACW or FAC (excluding FAC-) REMARKS_ +a is aj -Fah ad HYDROLOGY Recorded Data (Describe in Remarks) Stream, Lake or Tide Gauge Aerial Photographs Other None Feld Observations Depth of Surface Water. N (in.) Wetland Hydrology Present? Yes No Basis for determination: 6. A65 ►-ubra 7.Cov\y01ulL'AZ7 Sea,u 9. 10 Hydrophytic Vegetation Present? Yes No Basis for determination: 56 ° c", I— v Snrr� _ /ivw.,nw��-En '� Satt v '�hv� �n•z.� � PRIMARY Indicators Inundated Saturated in Upper 12" Water Marks Drift Lines Sediment Deposits Drainage Patterns in Wetlands jrbf 25 ev'OVAel.S SECONDARY Indicators Oxidized Root Channels in Upper 12' Water Stained Leaves Local Soil Survey Data FAG -Neutral Test Other (Explain in Remarks) Depth to Free Water in Pit: (/1 (in.) Depth to Saturated Soil:: ✓U (in.) SOILS r/ j Soils Mapped As: a V' MAAC Taxonomy (Series and Phase)- Profile Description: Depth Matrix Color fjnchesl Horizon (Munsell Moist) (� IZ low, `�►z ! �y �- 3�1 Hydric Soil Indicators: REMARKS:. Mottle Colors Mottle (Munsell Moist) abundance/Contrast) Drainage Class: Field Observations Confirm Mapped Type? Yes No Texture Concretions. Structure. etc. Aq u t;k , y e rt,. Histosol _ Reducing Conditions _ Organic Streaking in Sandy Soils Histic Epipedon Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List `—C' Suffidic Odor _ Concretions _ Listed on National Hydric Soils List Aquic Moisture Regime _ High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? es No REMARKS: Basis for determination: WETLAND DETERMINATION Is this Sampling Point Within a Wetland? f Yes) No INVESTIGATOR: Basis for determination: ` �� % — & APPENDIX E Earthen Trench Plug TRENCH PLUG WITH SELECTED LOW PENVEA&E. NOND►SPERSUKE CLAY MATERIA (YIN. PLAST/CI rr INDEX OF IOL COMPACTED TO 95% RELATIVE COMPACTION. SEE NOTE 2.--1 TOP Of TRENCH to BACXFILL AS REOUIRED w �. TRENCH Bo rrou PIPE acccrmG 6'AIIN.-j SfE NOTE J NOTES. 1. TRENCH PLUG SHALL BE xEYEO INTO EACH SIDE AMD BOTTOM OF TRENCH A MINIMUM OF 64. 2. WHERE SUITABLE IMPERVIOUS MATERIAL JS NOT AVAILABLE. LEAN MIX CONCRETE MAY BE SUBSrIr1ITEa J. PROVIDE TRENCH PLUGS AT LOCATIONS AND INTERVALS SP.£C/nm EARTHEN TRENCH PLUG B 400 E N T R A N C O August 16, 1999 John Hobson City of Renton Wastewater Utility Division 200 Mill Avenue South Renton, Washington 98055 7177 -11")N AUG 171999 CITY OF RENTON 10900 Re: Higate Sewage Lift Station Wetland Delineation Entranco Project No. 99133-60 NE 8TH STREET Dear Mr. Hobson: SUITE 300 BELLEVUE This letter summarizes my review of a wetland delineation documented in the Higate Sewage Lift Station Elimination, Wetland Delineation Report prepared in December WASHINGTON 1996 by Entranco (project no. 96038). The field analysis was completed in August 98004-4405 1996 and one 5- to 8-acre wetland was delineated. Because the wetland delineation was completed in late summer, wetland hydrology was assumed in some instances. Portions of the wetland in the project corridor were flagged; portions outside of the TELEPHONE project corridor were visually estimated. 425 454 5600 On July 21, 1999, 1 reviewed the wetland delineation report and examined the project corridor. No flags from the 1996 delineation were observed. The wetland boundaries that I observed corresponded to the wetland boundaries mapped in the delineation TOLL FREE report. Because I completed the review in the summer, I also had to assume wetland hydrology in some instances. 800 454 5601 1 also agree with the classification of the wetland as a City of Renton, Category 2 wetland, because the wetland is a headwater wetland. FAX 425 454 0220 If you have any questions concerning this project, please feel free to call me. Sincerely, INTERNET ENT ANCO, INC. www.entranco.com Ll en rgent Senior Wetland Ecologist KWS:jc ARIZONA CALIFORNIA IDAHO OREGON UTAH WASHINGTON i � y HIGATE LIFT STATION ELIMINATION VICINITY MAP SCALE 1"=200' �y CITY OF RENTON R i Planning/Building/Public Works Department I e Tanner, Mayor Gregg Zimmerman P.E., Administrator March 7, 2000 John Hobson RECEIVED Utility Engineer, City of Renton MAR 7 - 2000 Renton City Hall — 5th Floor CITY OF RENTON 1055 South Grady Way UTILITY SYSTEMS Renton, Washington 98055 SUBJECT: MODIFICATION REQUEST FROM THE WETLAND REGULATIONS- HIGATE LIFT STATION, FILE NO. LUA-99-088, ECF Dear John: I have reviewed your request for a modification from the City's Wetland Management code for the Higate Lift Station project. The evaluation and decision follow. Summary of Request The Utilities Section of the Planning/Building/Public Works Department has requested a modification from the City's Wetland Regulations. The proposal is to revise the Higate Sewer System by eliminating the existing lift station and replacing it with a gravity flow system. The project would likely impact 13,350 square feet of high quality, Category 2 wetland area as well as 6,600 square feet of wetland buffer area. The proposal does not clearly fall within the allowed and regulated activities established by the Wetland Regulations. Activities not listed are required to provide a wetland mitigation report and plan proposing compensation through the creation of new wetland areas at specified ratios. Section 4-3-11 ON allows the Administrator to grant modifications from the wetland regulations for individual cases. The Department Administrator shall first find that a specific reason makes the strict letter of this Code impractical, and that the minor modification is in conformity with the intent and purpose of this code, and that such modification: Will still meet the objectives of environmental protection, safety, function and maintainability intended by the Code requirements, based upon sound scientific judgment; b. Will not be injurious to other property(ies) in the vicinity; Result in no net loss of wetland or buffer area and function and value from that approved in the original project plan; DocumenQ\cor _ 1055 South Grady Way - Renton, Washington 98055 ® This paper contains 50 a recycled material. 20 % post consumer March 7, 2000 Page 2 d., Will be made prior to detailed "engineering and design,such as during site 'Plan review, short plat, preliminary plat approval or the pre -application. phase of planned unit development; and e.. Will be'.documented and entered as part of the official wetland permit file Background A Wetland Delineation Report, dated December 1996, was, prepared by Entranco, Inc. ,and submitted with the Higate Lift Station.land use application. The report was ' accompanied with a letter, dated August 16, 1999, which states the report is still valid based on -current site conditions.* According -to the report,.the site contains a high quality, Category 2 wetland involving scrub -shrub vegetation delineated.at up to 8 acres in size. The wetland is directly connected to the Higate Creek. corridor and is fed by. surrounding seeps.in several locations. The proposed 8-inch sanitary sewer. line would, be.installed by standard open trenching with in, a 30-foot wide construction and;utility�easement; which bisects'three single family properties. The construction corridor wouldlikely-impact approximately 13,350 square ,feet of wetland area and approximately,.6,'600 square'feet ofwetland buffer. area. RMC section 4-3-1.1 OK of the Wetland Regulations lists, specified allowed and regulated activities within designated wetland areas and buffers. These•activities are'permitted provided disturbed`areas-are immediately*restore'd: \AII other -proposed activities are required to provide a wetland mitigation'reporfand plan'proposing compensation through.the creation of,new wetland areas at.specified ratios: Although the project, proposes to• immediately restore all' disturbed areas to pre-existing conditions, including reseeding with a wetland seed mix;..the-proposed utility.line installation is not clearly listed under the regulation's -allowed activities. If not considered an allowedactivity the project would'.be, required -to. create; new wetland.are'as at a ratio of 2 times the area altered (approximately 26,700 square'feet). The -proposed utility line is, however, closely associated with;an -allowed activity. Therefore, a wetland modification request has been included..with the application in order to establish this specific proposal. as an allowed and regulated activity in'the wetland area and buffer. According to'the Wetland Report submitted with the -application, the proposal. is not anticipatedto result in permanent impacts to the wetland. The report includes recommendations., for temporary construction impacts resulting from the project; such as the establishment -of clearing limit fencing, protection of trees, methods forcutting vegetation to encourage rapid.regrowth; and keeping stockpile -soils areasawayfrom wetlands areas. In- order to mitigate the short term impacts to the,wetland area.and buffer, staff has recommended the applicant comply with the conceptual mitigations .contained within the wetland report as part of the Threshold Determiriation of Non - Significance — Mitigated. The City's issuance of, a' Threshold Determination .for the project would be contingent upon the approval of the subject modification request. In the eventthe modification is not approved; 'a wetland mitigation report and plan would be required and a threshold determination -would be recommended after the mitigation plan is reviewed. In addition to the approval of the modification, the project would be required to obtain approvals Documenbcor March 7, 2000 Page 3 'under separate permitting requirements for Department of Fish and Wildlife.Hydraulic Project Approval Permit(HPA); Army Corp of Engineers Section 40.4 permit, and Department of Ecology Water Quality Certification. 'Analysis 1.) Will still meet the objectives of environmental protection, safety, function and maintainability.intended by the Code requirements, based upon sound scientific judgment.. . Subsection K of the.City's Wetland Regulations provides.a list of allowed activities within wetland areas and buffers.'. The following is included as an allowed activity under the regulations: Normal and routine maintenance and repair of any existing public -or private uses and facilities where no alteration of the wetland or additional,fill materials will be placed. The use of.Neavyconstruction equipment shall be limited to utilities and public agencies that•require this type, of equipment for normal,and routine maintenance and repair of existing utility or publie,structures and rights -of -way. In every case; wetland -impacts shall be'mihimized and disturbed areas shall be restored during and- immediately after the'use 'of,consruction equipment (4-3- 110K1 d). Essentially, the. proposal is to,- perform modifications to an, existing sanitary sewer system. Similar to the proposed gravity line, the lift station is. located within the boundary of a Category 2 wetland. The. existing, facility has reached .the end of its service life. The replacement of the lift station with'a gravity sewer line could. . be considered .maintenanc6 to an existing, public facilitywhere it,would otherwise not be able to provide'ade'quate service. The proposal should, therefore, be included as an allowed 'activity under the *r ision'listed above. The intent of the Wetland Regulation's requirements for wetland replacement is to provide compensation when a project results in a.permanent loss of wetland. , ..area. The, subject sewer line proposal would only, result in'temporark construction impacts which would be immediately'mitigated throudh'restoration measures. Therefore, the project would' result 'in no net.loss of wetland area.. t If the proposal'is not considered an allowed and regulated. activity within wetland areas and buffers, the project would be'required to. create approximately 26,700 ..square feet of new high quality,- Category? wetland' areas. It would' be unduly 'burdensome'to require the project to createadditional wetland areas in order to offset temporary, not permanent, losses. It would. be .more appropriate to require the project to comply with the measures'recommerided in the submitted wetland report during site preparation,and construction: DocumenMcor . March 7, 2000 Page 4 2.) •Will not be injurious to other property(les) in the vicinity. The .proposed activity -would remain within established construction and utility easements. Temporary short-term impacts may result from the initial construction of the -facility..' However, -the surrounding properties are anticipated to, benefit from improved sanitary sewer system:` , 3.) Result in no net loss of wetland or: buffer area and function and value from that approved in the original project plan. As stated under criterion,number one,.the• project is not anticipated to result in permanent impacts to the wetland areas or buffers. Therefore, no net loss of wetland or buffer area and'function and value would occur. •4.) Will be made prior to detailed engineering' and design, such'as during site plan review, short plat, preliminary plat approval or the pre -application phase of planned unit development., The modification request; has-been made prior to detailed engineering and design of the gravity -,sewer line. The final design shall incorporate all SEPA and' regulatory agency requirements; 5.) Will be documented and ent&ed,as_part ofthe, •official.wetland permit file. The modification.will,be documented and entered as part of;the official land,use file for the project. Decision: The.wetlandmodification request to allow, for the installation'of•the proposed 8-inch sanitary sewer line as an allowed and 'regulated.activity-under.the'Wetland Regulations. is approved, with the conditions 'thafithe recommendations of the.. Wetlsnd'Reportregarding limiting construction impacts are followed, and all disturbed areas thin the wetland are immediately returned to pre- existing conditions. Sincerely, Gregg Zimmerman; Administrator Planning/Building/Public Works Department. cc: Jennifer Henning Lesley Nishihira Document2kor CITY OF RENTON PLANNING/BUILDING/PUBLIC WORKS MEMORANDUM DATE: 2/14/2000 TO: Leslie Nishihira FROM: John Hobson J SUBJECT: Higate Lift Station Elimination Project: Request for Modification of Wetland Regulations The City's Wastewater Utility is seeking a modification to the City's Wetland regulations under Section 4-3-110 subsection "N" for construction of a new sewer main through a wetland. The City's Higate Sewage Lift Station is currently located on NE 20`h St. approximately 400 feet east of the intersection of NE 201h St. and Jones Avenue NE. The lift station is also located within the boundary of a class 2 wetland. This lift station has reached the end of its service life. The Wastewater Utility proposes to remove the existing lift station and replace it with an 8" diameter gravity sewer system. This system will begin within the roadway of NE 201h St., adjacent to the existing lift station, and proceed approximately 612 feet north through a class 2 wetland and its buffer. The new main will then proceed west approximately 409 feet through the wetland and its buffer to an existing manhole in the roadway of Jones Avenue NE. The project proposes to utilize standard open trenching for installation of the new sewer line. The trench will be backfilled with crushed rock to a point that is 2 feet above the crown of the pipe. Native material will then be replaced to the top of the trench. This method will allow the subsurface waters to continue to flow as they did before the construction and will also allow the native vegetation to resume growth along the trench. As part of the project, only one manhole will be installed outside of the roadways. This manhole will be installed at the angle point in the new sewer and will be located outside of the wetland and buffer. The City's maintenance division reviewed this portion of the design. They indicated that they would be able to service the lines from Jones Ave NE and NE 20`h St so this should not present a problem. The design also incorporates the use of 7 CDF trench plugs to prevent the piping of groundwater along the trench line. The Wastewater Utility believes that due to its design concept for the new sewer, the proposed project will not result in any loss of wetland or buffer and will continue to function as is does prior to construction. Final design of the project shall incorporate all SEPA and regulatory agency requirements. This request for modification and any other documentation will be entered as part of the City's SEPA file. A copy of the preliminary plans have been attached for your information. cc: Lys Flomsby \\CENTRAL\SYS2\DEPTS\PBP W\DI VISION.S\UTILITIE.S\DOCS\2000-067.doc\jdh a CITY OF RENTON DEVELOPMENT SERVICES DIVISION LIST OF SURROUNDING PROPERTY OWNERS within 300 feet of the subject site PROJECT NAME: /IA- ATE APPLICATION NO: The following is a list of property owners within 300 feet of the subject site. The Development Services Division will notify these individuals of the proposed development. NAME ADDRESS ASSESSOR'S PARCEL NUMBER (Attach additional sheets, if necessary) r- NAME (Continued) ADDRESS Applicant Certification ASSESSOR'S PARCEL NUMBER I, J.",J � ,fi3so,�� , hereby certify that the above list(s) of adjacent property (Print Name) ``���111111////// owners and their addresses were obtained from: ``�� G, FERkj,L Q. .•-ssionCA. i -gC'City of Renton Technical Services Record 4=,o P fi ,s ❑ Title Company Records z NpT: �o ❑ g County Assessors Records Signed Date S �g i� >F'?'qY a 2c. :_4 (Applicant)/�011lWAS 11 NOTARY ATTESTED: Subscribed and sworn before me, a Notary Ppblic, in and for the State of Washington, residing at I�r-7 q701-4 on the 61 L-_ day of Signed i/ltc� rt C (Notary Public);' "' For City of Renton Use*" CERTIFICATION OF MAILING hereby certify that notices of the proposed application were mailed to (City Employee) each listed property owner on Signed Date. - NOTARY ATTEST: Subscribed and sworn before me, a Notary Public, in and for the State of Washington residing at on the day of . 1 :: Signed h"Aprop.doc M2 V 07198 MLLEGAS CLYDE W KAISER GERALD R+KRISTEN L ELDRIDGE DEBORAH H STEEDMAN SHAARI L 1700 MONTEREY CT NE 1708 MONTEREY CT NE 1632 MONTEREY CT NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 STUART ROBERT A+CATHERINE O 1716 MONTEREY CT NE RENTON WA 98056 CORWIN ROBERT C+JOYCE 1717 MONTEREY CT NE RENTON WA 98056 SUNSET HILLS HOA C/O JOEL T HUFF 2421 KENNEWICK AVE NE RENTON WA 98056 WOLF DELORIS J 2415 KENNEWICK AVE NE RENTON WA 98056 COWAN JACK L+BETTY 905 LYNNWOOD AVE NE RENTON WA 98056 TYLER JERRY ALLEN SR+BEVERL 2419 KENNEWICK PL NE RENTON WA 98056 QUACH CHAU V+MARIA P 2406 KENNEWICK PL NE RENTON WA 98058 MCKENZIE DONALD R 2424 MONTEREY NE RENTON WA 98056 ROY JOANNA S 1724 MONTEREY CT NE RENTON WA 98056 TAKASHIMA KIYOKO 1709 MONTEREY CT NE RENTON WA 98056 SUNSET HILLS HOA C/O JOEL T HUFF 2421 KENNEWICK AVE NE RENTON WA 98056 BROOKS CARL E 2414 KENNEWICK PL NE NEWCASTLE WA 98056 COWAN JOHN 1830 NE 24TH RENTON WA 98056 KARTES CRAIG J+KATHRYN D 2418 KENNEWICK AVE NE RENTON WA 98056 ZETTERBERG KEVIN+BARBARA 2400 KENNEWICK AVE NE RENTON WA 98058 LARSON JERRY O 2418 MONTEREY AVE NE RENTON WA 98055 HUMPHREY MARK J 1725 MONTEREY CT NE RENTON WA 98056 RIPLEY JOHN I+CONSTANCE B 4310 85TH AVE NE MERCER ISLAND WA 98040 DELAPP DERRELL & ISABELL 2409 KENNEWICK AVE NE RENTON WA 98056 COWAN JACK L+BETTY 905 LYNNWOOD AVE NE RENTON WA 98056 DINKINS VERONICA B+STEVEN J 2413 KENNEWICK PL NE RENTON WA 98056 BUCK GARY R+M STACY 2412 KENNEWICK AVE NE RENTON WA 98056 BAKKO JOHNNY R 1922 NE 24TH ST RENTON WA 98055 WILGUS MICHAEL R 2412 MONTEREY AVE NE RENTON WA 98056 PO TSANG W AMICK DUANE W+PATRICIA M HANSON JAMES R+MARGARET L 13707 NE 6TH PL #A2-202 1601 NE 24TH ST 2225 JONES AVE NE BELLEVUE WA 98005 RENTON WA 98055 RENTON WA 98055 AUNGER STUART L+IUDITFI I 2224 HIGH AVE NE RENTON WA 98056 ULRICH MARTIN J 2209 JONES AVE NE RENTON WA 98056 CHAVIS LYNN A 2216 HIGH AVE NE RENTON WA 98056 SPARROW WILLIAM M 2115 JONES AVE NE RENTON WA 98056 JANE RUTH D 2100 HIGH AVE NE RENTON WA 98055 DOBSON WYMAN 821 N 1ST ST RENTON WA 98055 HAWKEN LEONA ANN 1917 JONES AVE NE RENTON WA 98056 JORGENSENJJ 1901 JONES AVE NE RENTON WA 98055 SPENCER GENEVIEVE 1809 JONES AVE NE RENTON WA 98056 I-IU)'NI-I "I U PHUONG 2300 HIGH AVE NE RENTON WA 98056 PRESTON VIRGINIA C 2217 .ZONES AVE NE RENTON WA 98056 BRENDEMIHL FRITZ W 2116 HIGH AVE NE RENTON WA 98056 HOLT ESTHER L 2124 HIGH AVE NE RENTON WA 98055 QUINCEY ALEXANDER V & MARY 2025 JONES AVE NE RENTON WA 98056 FANNING GEORGE A 2021 JONES AVE NE RENTON WA 98056 BANES DENNIS R 1909 JONES AVE NE RENTON WA 99056 PORCELLO ANTHONY J 1817 JONES AVE NE RENTON WA 98056 BISBEE JOSEPH D+IRENE 11 1725 JONES AVE NE RENTON WA 99056 RATRAY R N 2301 .ZONES AVE NE RENTON WA 98055 STEWART KENNETH .IACKSON JR 2132 HIGH AVE NE RENTON WA 98055 ULRICH DANIEL E+CAROL 2125 JONES AVE NE RENTON WA 99055 WE] LUANN KIM 2033 JONES AVE NE RENTON WA 98056 SCHUMSKY DONALD 2019 JONES AVE NE RENTON WA 98055 SCHUMSKY DONALD 2019 JONES AVE NE RENTON WA 98055 HAWKEN LEONA ANN 1917 JONES AVE NE RENTON WA 98056 LEMON LUCIEN W 1801 JONE AVE NE RENTON WA 98056 SMITH DARRYL .I 1733 JONES AVE NE RENTON WA 98055 MEADOWS DARYL+CATHLEEN PENNEY ELMER C IR DANIELS .LAMES+JEAN 1633 JONES AVE NE 1625 JONES AVE NE 1707 JONES AVE NE RENTON WA 99056 RENTON WA 98055 RENTON WA 98056 BARKER SHARON A 2414 .ZONES AVE NE RENTON WA 9805() DIER ROBERT EDWARD 1732 NE 24TH STREET RENTON WA 9805O TAYLOR LORRAINE 2208 JONES AVE NE RENTON WA 99056 SWALKO MARK A 2010 JONES AVE NE RENTON WA 98056 SUNDBY DOUGLAS P 1700 NE 20TH RENTON WA 98056 TOMCHICK JOHN A+LAUREL S 1900 JONES AVE NE RENTON WA 0 SKELLENGER LOIS 1806 JONES AVE NE RENTON WA 98055 HUEBNER ROBERT F 1700 JOKES AVE NE RENTON WA 98056 NGUY TRUNG KIEN 1720 NE 16TH ST RENTON WA 98056 BuTcHER ROBERT .I 2422 iONES ;AV1 NE RENTON WA 98056 131TNEY DEAN+JO 2727 MOUNTAIN VIEW AVE NORTH RENTON WA 98056 CODIGA MARIE 2216 .ZONES AVE NE RENTON W A 98055 POHL CHARLES A & WINIFRED K 2004 JONES AVE NE RENTON WA 98056 ARENS ROBERT F 1703 NE 20TH ST RENTON WA 98055 CLARE D F 1818 JONES AVE NE RENTON WA 98056 SMITH DARRYL J 1733 JONES AVE NE RENTON WA 98056 LUNSFORD LARRY M+SUSAN 1716 JONES AVE NE RENTON WA 98056 LUNSFORD LARRY M+SUSAN 1716 JONES AVE NE RENTON WA 98056 MORELLI F JOHN 1726 NE 24TI-I Sl- RENTON WA 98050 WILLIAMS RODNEY N & DIANE A 2402 .ZONES AVE NE RENTON WA 98056 BARTELL ROBERT H+ALINA M 1725 NE 24TH ST RENTON WA 98055 EGAN E JOHN 2100 JONES AVE NE RENTON WA 98056 ARENS ROBERT F 1703 NE 20TH ST RENTON WA 98055 JOHNSON RONALD ROGER 1824 JONES AVE NE RENTON WA 98056 COLOMBI LOUIE F+MARGUERITE 1800 JONES AVE NE RENTON WA 98056 ESPEY CAROL 1624 JONES AVE NE RENTON WA 98056 KINZER DARRELL #13716 'G, EXECUTIVE HOUSE INC 7517 GREENWOOD AVE N SEATTLE WA 99103 UNBEDACHT .IEFFREY B+CHARLYN BROWNFIELD KEITH W+DEBBIE A CORE DOUGLAS C 2120 .ZONES AVE NE 22021 SE 29TH PL 1828 NE 20TH RENTON WA 98056 ISSAQUAH WA 98027 RENTON WA 98055 DENZLER CHRISTI,AN R CAVE R013ERT N LONG ROCHELLE T+ERIC C 1800 NORTHEAST 201-1-1 STREET 125IS S E 17TH ST 4131 BROOKLYN AVE NE RENTON WA 98056 BELLEVUE WA 98005 SEATTLE WA 98105 CAVE ROBERT N BLUNDRED JAMES C JR LAPLANT HOWARD 1-1 8c MURIEL E 12518 S E 17TH ST 1800 NE 24TH ST 1917 NE 24TFI ST BELLEVUE WA 98005 RENTON OVA 98()56 RENTON WA 98055 ROWE CHARLES J ZIRK LEOMA J LANDE-SHANE MARY DARLENE 1909 NE 24TH ST 1833 NE 24TH ST 9037 38TH AVE SW RENTON WA 98055 RENTON WA 98056 SEATTLE WA 98126 TORBENSON WILLADENE M BLONSKI MICHAEL D CHAMBERLAIN TIMOTHY 1836 NE 20TH ST/P O BOX 201 1908 NE 20TH 1832 NE 20TH RENTON WA 98057 RENTON WA 98055 RENTON WA 98056 BRAY JULIE E NELSON JAMES A FINNICUM DAINIE H+BEULAH I 14138 34TH PL S 1905 NE 20TH ST 2001 NE 20TH ST SEATTLE WA 98168 RENTON WA 98056 RENTON WA 98056 VANCE CHRISTINE B VANCE BRIAN D DAY SHJRLENE R 2129 ABERDEEN AVE NE 13811 SE 173 PL 1932 NE 20TH ST RENTON WA 98056 RENTON WA 98058 RENTON WA 98056 REDFERN RICHARD C WEIGEL VIVIAN A ISLER JAMES L 2000 NE 20TH ST 16853 SE 112TH STREET 1912 NE 20TH ST RENTON WA 99056 RENTON WA 98059 RENTON WA 98055 JELLEY ISAAC N LANDE-SHANE MARY DARLENE CARR MARK S+CARR,MICHAEL L 2009 NE 24TH ST 9037 38TH AVE SW 2309 ABERDEEN AVE NE RENTON WA 98055 SEATTLE WA 98126 RENTON WA 98056 WATSON MICHAEL DOUGLAS BENNETT RONALD D+JANE M HARRISON VIOLA M 1929 24TH ST NE 2421 MONTEREY AVE NE 2417 MONTEREY AVE NE RENTON WA 98055 RENTON WA 980% RENTON WA 98056 SMITH RONALD L OLIVER JON A+SUSANNE E ROHDE DON B 2427 ABERDEEN NE 2409 ABERDEEN AVE NE 2401 ABERDEEN AVE NE RENTON WA 98055 RENTON WA 98050 RENTON WA 98055 RALLISON STEPHEN f+PATRICIA 2016 NE 241-1-1 ST RENTON WA 98056 CLAYPOOL SANDRA L+GOLDIE 2325 ABERDEEN AVE NE RENTON WA 98059 RIEKER GERALD L & SOLING HEE 11017 101 ST PL NE KIRKLAND WA 98033 CLAYPOOL SANDRA L+GOLDIE 2325 ABERDEEN AVE NE RENTON WA 98059 HUGHES HARRY B+JANICE J 2213 ABERDEEN AVE NE RENTON WA 98056 ROBERTO PATRICIA R 2123 ABERDEEN AVE NE RENTON WA 98056 GIBSON CHARLES E 2008 NE 20TH ST RENTON WA 98056 BISIACK ANTOINETTE B 2101 ABERDEEN AVE NE RENTON WA 98056 ALDER BETTY A 1829 ABERDEEN AVE NE RENTON WA 98056 DYMARKOWSKI DANIEL B 2020 NE 241-1-1 RENTON WA 98055 RIEKER GERALD L &. SOUNG HEE 11017 MIST PL NE KIRKLAND WA 98033 RIEKER GERALD L & SOUNG HEE 11017 MIST PL NE KIRKLAND WA 98033 COLLINS WILLIAM V 2201 ABERDEEN NE RENTON WA 98055 SAYRE M E 2005 ABERDEEN AVE NE RENTON WA 98056 JOHNSTONE LINDSEY N+KATHLEE 2119 ABERDEEN AVE NE RENTON WA 98056 LARSEN MARIE L 2006 NE 20TH ST RENTON WA 98055 MOORE ROSEMARY T+DAVID R 2025 ABERDEEN AVE NE RENTON WA 98056 GREEN BERLE 1931 ABERDEEN AVE NE RENTON WA 98056 RIEKER GERALD L & SOUND I-IEE 1 1017 101 ST PL NE KIRKLAND WA 98033 RIEKER GERALD L & SOUNG HEE 11017 JOIST PL NE KIRKLAND WA 98033 CARR MARK S+CARR,MICI-IAEL L 2309 ABERDEEN AVE NE RENTON WA 98056 OLSON STANLEY 2217 ABERDEEN AVE NE RENTON WA 98056 ROUTSON RICHARD E+MARLENE J 460 MT JUPITER DR SW ISSAQUAH WA 98027 ARCHER D O 2127 ABERDEEN AVE NE RENTON WA 98056 DAVIS MICHAEL 2020 NE 20TH RENTON WA 98055 ODREN MICHELE K+MULLEN JAME 2030 NE 20TH ST RENTON WA 98056 BOSTROM THOR+KARLA 1809 ABERDEEN AVE NE RENTON WA 98056 VIG GARY DEAN+JULIANNE REED MOTE KERMIT+RAUB,VICKI L WOODIN HAROLD 1833 ABERDEEN AVE NE 1901 ABERDEEN AVE NE 1801 ABERDEEN AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 GREEN BERLE BRODKA HELMUT GLOCKNER EILEEN 1831 ABERDEEN AVE NE 12602 SE PETROVITSKY RD 1927 ABERDEEN AVE NE RENTON WA 98055 RENTON WA 98058 RENTON WA 98056 GUSTAFSON SONJA G 1933 ABERDEEN AVE NE RENTON WA 98056 BECKWITH A K 1733 ABERDEEN AVE NE RENTON WA 98056 CHRISTENSON CHARLES D 1700 MONTEREY AVE NE RENTON WA 98055 SWIHART MARK A+WENDY R 1718 MONTEREY AVE NE RENTON WA 98056 CREEGAN MICHAEL P 517 SMITHERS AVE S RENTON WA 98055 VALENTINE PATRICK S R 1915 MONTEREY AVE NE RENTON WA 98056 SCHUEHLE RYAN WILLIAM+KIRST 1908 NE 19TH PL RENTON WA 98056 MOFFAT GARY S 1903 NE 19TH PL RENTON WA 98055 HILLEGAS CLYDE W TAX TITLE CONT. 16688 1632 MONTEREY COURT NE RENTON WA 98056 COCHRAN JILLENE 1709 ABERDEEN AVE NE RENTON WA 98056 COOPER LAWRENCE E H+COOPER 1706 MONTEREY AVE NE RENTON WA 98056 MARTIN LARRY E+CHERIE L 1802 MONTEREY AVE NE RENTON WA 98056 MCKILLOP STEPHEN V 1820 MONTEREY AVE NE RENTON WA 98056 MIKO LARRY H 1909 MONTEREY AVE NE RENTON WA 98056 WOOD SAM L 1902 NE 19TH PL RENTON WA 98056 RUSTAD TIGE R+ST ICHLING MO 1909 NE 19TH PL RENTON WA 98056 BECKWITH A K 1733 ABERDEEN AVE NE RENTON WA 98056 NOLL ZITA M 1701 ABERDEEN AVE NE RENTON WA 98056 PUDLO EDWARD J+JOAN KARLA A 1712 MONTEREY AVE E RENTON WA 98056 STOKES DUANE R+ANDERSON KAT 1808 MONTEREY AVE NE RENTON WA 98056 HAUTALA JEFF A 1904 MONTEREY AVE NE RENTON WA - 98056 HANADA RONALD D & MARIE S 14409 148TH PL SE RENTON WA 98059 RIDER SUSAN E 1835 NE 20TH RENTON WA 98056 HUI FERNANDO & NANCY 2105 96TH AVE NE BELLEVUE WA 98004 COPPESS MICHAEL D+LAURA L MITCHELL BRIAN A STEVENS CAMERON ETAL 12119 SE 13TH ST 1801 MONTEREY AVE NE 1721 MONTEREY AVE NE BELLEVUE WA 98005 RENTON WA 98055 RENTON WA 98055 COMBS GARY N 13AKER ROBERT G+CONNIE? E JANES RICHARD W 1715 NIONTEREI' AVE NE 1709 N,IONTEREI' ,,\VE NE 1906 NE 171-1-1 PLACE RENTON WA 980% RENTON WA 98050 RENTON WA 98050 MILLICAN PAUL E & ROSALINDA 1826 NE 17TE-I PL RENTON WA 98056 THORNHILL DOUGLAS+PATRICIA 1823 NE 17TH PL RENTON WA 9W56 `I'ORKELSON KENNETH A 1820 NE 17TH I'L RENTON WA 98056 THORNTON ALAN H 1901 NE 17TH PL NEWCASTLE WA 98056 CITY OF RENTON HILL JAY G BENNETT W E 2417 JONES AVE NE 200 MILL AVE S RENTON WA 98055 RENTON WA 98055 GRANT GEORGE K WIEHOFF RONALD W+ALVERNA J 2425 JONES AVE NE 1612 KENNEWICK AVE NE RENTON WA 98056 RENTON WA 98056 KUBOTA HISAKO SC1 WAB LAURA M 1702 KENNEWICK AVE NE 1706 KENNWICK AVE NE RENTON WA 98055 RENTON WA 98056 WIEHOFF CHARLES A & MARY E 1708 KENNEWICK AVE NE RENTON WA 98056 MINKLER ROBERT J 1701 KENNEWICK AVE NE RENTON WA 98055 MACKENZIE BONNIE .I+ESTHER M 1817 NE 17TH PL RENTON WA 98056 SALAVEA MALU 1907 NE 17TH PL RENTON WA 98055 STATE OF WASHINGTON 0 WOODWORTH J M 1624 KENNEWICK AVE NE RENTON WA 98055 WIEHOFF CHARLES A & MARY E 1708 KENNEWICK AVE NE RENTON WA 98056 SWANSON ELSIE C PO BOX 2352-0352 1625 KENNEWICK AVE NE RENTON WA 99056 DUNCAN WILLIAM L STATE OF WASHINGTON CITY OF RENTON 1619 KENNEWICK AVE NE 0 BENNETT W E RENTON WA 98056 200 MILL AVE S RENTON WA 98055 CNle15r/4AI Alc-iIATz-b : JEF-� Z NAME: J�:eIkI--L-LER LquiL'-ALE CI-►APL-'Itj 60gl>Cey UuBE: DAGHT ('ADDRESS: /SOO ICITY: )�AtTb, / Zo/p Z/ 2-O -/wgU 5 AV6 Art� Ag ZIP: Me)5,65, ICOMPANY (if applicable): C/T% GF- ADDRESS: /OSS S. CRAD`� 1�llJj� CITY: ZIP:OSS COMPANY (if applicable): I ADDRESS: CITY: ZIP: PROJECT OR DEVELOPMENT NAME: N/647r Li-F-7— �TrfT/DII.I 5r:/r/1L1,4-r10A.f PROPERTYIPROJECT ADDRESS(S)/LOCATION: Zl Zc �cn/C s /��c AAF- Ave 1,k KING COUNTY ASSESSOR'S ACCOUNT NUMBER(S): -334-3c)0 3?,oa 3343Q O Z12,C3 33+1F)o 35'ia EXISTING LAND USE(S): SI AJ6,LE Ri6--,i!i-Of� PROPOSED LAND USES: l,la (SksiA76-, i IEXISTING COMPREHENSIVE PLAN MAP DESIGNATION: PROPOSED COMPREHENSIVE PLAN MAP DESIGNATION (if applicable): EXISTING ZONING: PROPOSED ZONING (if applicable): Vo/f/��E SITE AREA (SQ. FT. OR ACREAGE): 07J -rTl �irs��y�cT i PROJECT VALUE: �j�0� OI7c� IS THE SITE LOCATED IN THE AQUIFER PROTECTION AREA? ys . z IS THE SITE LOCATED IN ANY OTHER TYPE OF ENVIRONMENTALLY SENSITIVE AREA? TELEPHONE NUMBER: ANNEXATION $ SUBDIVISION: _ COMP. PLAN AMENDMENT $ _ REZONE $ _ LOT LINE ADJUSTMENT $ _ SPECIAL PERMIT $ _ SHORT PLAT $ _ TEMPORARY PERMIT $ _ TENTATIVE PLAT $ _ CONDITIONAL USE PERMIT $ _ PRELIMINARY PLAT $ _ SITE PLAN APPROVAL $ _ FINAL PLAT $ _ GRADE & FILL PERMIT $ _ _ (NO. CU. YDS: ) PLANNED UNIT DEVELOPMENT: $ VARIANCE $ _ (FROM SECTION: ) PRELIMINARY WAIVER $ _ FINAL _ WETLAND PERMIT $ _ _ _ ROUTINE VEGETATION MOBILE HOME PARKS: $ MANAGEMENT PERMIT $ _ BINDING SITE PLAN $ SHORELINE REVIEWS: SUBSTANTIAL DEVELOPMENT $ _ CONDITIONAL USE $ _ VARIANCE $ _ EXEMPTION $No Charne _ ENVIRONMENTAL REVIEW $ _ REVISION $ �1FFtDAVIT OF OWNERSHIP I, (Print Name) J="Iq ��ta��on� declare that I am (please check one) _ the owner of the property involved in this application,, -,(the authorized representative to act for the property owner (please attach proof of authorization), and that the foregoing statements and answers herein contained and the information herewith submitted are in �kjtW4oy,que and correct to the best of my knowledge and belief. .FERKQ-, OQ �*\sslonF�A/C��I • o m.y ;aTTEST: Subscribed and sworn to before me, a Notary Public, in and ���,� �f �p _Z �►; NOTAR ), P {k the State of WQS residing at (Name of O er/Representative) —— on the day of SUN•• PUBLIC ; 2 (Signato, er/Repr entative) ��//�oI�Wi;; Al (Signature of Notary Public) (Thlssectionao be:completed by:Ctty Staff ! Clty;',Flle Number . A .....ABSP CAPS : CAPU CPA CU-A CU H ECF LLA MHP FPUD F.P:PP R <.RVMP SA=A. SA H .SHPL A` SHPL H. SP SM:: .SME TP :<V A . ;V B V H W: ` TOTAL. :FEES:S TOTAL"POSTAGE PROVIDED: S MASTERAP.DOC REVISED 8/97 PROJECT NARRATIVE HIGATE LIFT STATION ELIMINATION The purpose of the project is to eliminate the Higate sewer lift station and replace it with a gravity sewer system. A new 8" gravity sewer line will be installed beginning at an existing sewer line in NE 201h St (at a point approximately 400 feet west of the intersection of NE 20`h St and Jones Avenue NE), extended to the north (through existing utility easements across private property) approximately 646 linear feet, thence west approximately 440 linear feet where it will connect into an existing sanitary sewer manhole in Jones Avenue NE. The project will result in an addition of 4 new sewer manholes along the new sewer line. The two privately owned properties that contain the existing utility easements for the proposed sewer line have one single-family residence each. The majority of these properties and approximately 814 linear feet of the new sewer line will be located within a category 2 wetland and its 50-foot buffer. The sewer trench will be backfilled with imported backfill within a zone 2 feet below to 2 feet above the new pipe. The remainder of the backfill will utilize the existing native material, which was excavated for pipe placement, to retain the hydraulic characteristics of the ground water within the wetland area. Impervious earth dams will be placed at points along the trench excavation to prevent the "piping" of ground water along the trench line. Approximately 12 — 5" to 8"diameter, 3 — 18" diameter and 1 — 30" diameter deciduous trees will be removed during the pipe line excavation. Asphalt restoration will take place within the construction zone in the existing roadways of NE 20`h St and Jones Ave NE. The estimated cost of the project is $300,000. CITY OF RENTON DETERMINATION OF NON -SIGNIFICANCE (MITIGATED) APPLICATION NO(S): LUA-99-088,ECF APPLICANT: City of Renton; Utilities Division (John Hobson) PROJECT NAME: Higate Lift Station Elimination DESCRIPTION OF PROPOSAL: The Utilities Division of the P/B/PW Department is proposing to eliminate the Higate sewer lift station and replace it with a gravity sewer system. The project site consists of two existing City held easements totaling 30 feet in width (15-foot wide utility easement & overlying 30-foot wide construction easement), which cross three separate properties. The site is designated Residential — 8 dwelling units per acre (R-8) on the City of Renton's Zoning Map. The proposed use of the site, as a "small utility," is considered an outright permitted use in the R-8 zone. The new 8-inch gravity sewer line will extend north from NE 20th Street for 646 feet, then turn west at a right angle. The line is proposed to continue west for 440 feet where it will connect to an existing sanitary sewer manhole located in Jones Avenue NE. The project also includes the placement of four new sewer manholes as well as the restoration of disturbed areas (vegetation and asphalt). Approximately 814 linear feet of the proposed sewer line would be located within a Category 2 wetland and its 50-foot buffer. A modification to the wetland regulations has been requested in order to allow the proposed activity in wetland and wetland buffer areas, thereby exempting the project from wetland compensation requirements. LOCATION OF PROPOSAL: 1800 NE 20"' Street and 2010 & 2120 Jones Avenue NE LEAD AGENCY: City of Renton Department of Planning/Building/Public Works Development Planning Section The City of Renton Environmental Review Committee has determined that it does not have a probable significant adverse impact on the environment. An Environmental Impact Statement (EIS) is not required under RCW 43.21 C.030(2)(c). Conditions were imposed as mitigation measures by the Environmental Review Committee under their authority of Section 4-6-6 Renton Municipal Code. These conditions are necessary to mitigate environmental impacts identified during the environmental review process. Appeals of the environmental determination must be filed in writing on or before 5:00 PM March 27, 2000. Appeals must be filed in writing together with the required $75.00 application fee with: Hearing Examiner, City of Renton, 1055 South 111 B. Additional information WA 8055. egard ngt he appeal proceseals to the sner are may be obtained bfromitthefRenton Renton City Clerk's k'Code Section 4-8- s Office, (425) 430- 6510. PUBLICATION DATE: DATE OF DECISION: SIGNATURES: 3"Limmer-Mn, Aominis rtment of Planning/Buil C munity Services Lee Wheeler, Fire Chief i' Renton Fire Department' March 13, 2000 March 7, 2000 g/Public Works 3 7 d DA E D 'TE eresignature CITY OF RENTON DETERMINATION OF NON -SIGNIFICANCE (MITIGATED) MITIGATION MEASUR APPLICATION NO(S): LUA-99-088,ECF APPLICANT: City of Renton; Utilities Division (John Hobson) PROJECT NAME: Higate Lift Station Elimination I DESCRIPTION OF PROPOSAL: The Utilities Division of the P/B/PW Department is proposing to eliminate the Higate sewer lift station and replace it with a gravity sewer system. The project site consists of two existing City held easements totaling 30 feet in width (15-foot wide utility easement & overlying 30- foot wide construction easement), which cross three separate properties. The site is designated Residential — 8 dwelling units per acre (R-8) on the City of Renton's Zoning Map. The proposed use of the site, as a "small utility," is considered an outright permitted usel in the R-8 zone. The new 8-inch gravity sewer line will extend north from NE 20th Street for 646 feet, then turn west at a right angle. The line is proposed to continue west for 440 feet where it will connect tolan existing sanitary sewer manhole located in Jones Avenue NE. The project also includes the placement of four new sewer manholes as well as the restoration of disturbed areas (vegetation and asphalt). Approximately 814 linear feet of the proposed sewer line would be located within a Category 2 wetland and its 50-foot buffer. A modification to the wetland regulations has been requested in order to allow the proposed activity in wetland and wetland buffer areas, thereby exempting the project from wetland compensation requirements. LOCATION OF PROPOSAL: 1800 NE 20'h Street and 2010 & 2120 Jones Avenue NE MITIGATION MEASURES: 1. The applicant shall follow the recommendations contained within the Subsurface Investigation and Geotechnical Engineering Report for the Higate Sewer Project, dated January 12, 2000, prepared by Golder Associates. 2. The applicant shall follow the conceptual mitigation recommendations contained within the Higate Sewage Lift Station Wetland Delineation Report, dated December 1996, prepared by Entranco, Inc. MEN i HIGATE LIFT STATION ELIMINATION VICINITY MAP SCALE V=200' A WASHINGTON Y JOINT AQUATIC RESOURCE PERMITS APPLICATION (JARPA) —INSTRUCTIONS— This Joint Application can be used to apply for Hydraulic Project Approvals, Shoreline Management Permits, Approvals for Exceedance of Water Quality Standards, Water Quality Certifications, Coast Guard Bridge Permits, Department of Natural Resources -Use Authorization, and Army Corps of Engineers Permits. You must submit readab/e.coples of the completed application form together with detailed drawings, prepared In accordance with the drawing guidance In Appendix A to the - -appropriate agencies. -You do not need to send the example drawings, the instructions, or the Appendices. Remember, depending on the type of project you are proposing, other permits may be required that are not covered by this application. ' Use the following checklist to determine which permits to apply for. Your project may require some or all of these permits. If you have trouble deciding which permits you need, please contact the appropriate agency for questions. Agency telephone numbers are in Appendix B. IF YOU CHECK ANY BOX UNDER A PERMIT TITLE,•THEN .YOU MUST APPLY FOR THAT PERMIT. Complete Sections A & C for any of the permits listed below. Also complete Section B for Shoreline and Army Corps of Engineers permits. Detailed drawings are required for any of these permits (see Appendix A for drawing requirements). ♦ Hydraulic Project Approval from the Department of Fish and Wildlife under 75.20 RCW is required if your project includes construction or other work, that: ❑ will use, divert, obstruct, or change the natural flow or bed of any fresh or salt water of the state. This includes all construction or other work waterward and over the ordinary high water line, including dry channels, and may include projects landward of the ordinary high water line (e.g., activities outside the ordinary high water line that will directly impact fish life and habitat, falling trees into streams or lakes, etc.). ♦ Shoreline Substantial Development, Conditional Use, Variance Permit, or Exemption from Local Government (under the Shoreline Management Act, 90.58 RCW;) required for work or activity in the 100-year floodplain, or within 200 feet of the ordinary high water mark of certain waters; and which includes any one of the following: ❑ dumping; ❑ drilling; ❑ dredging; ❑ filling; ❑ placement or alteration of structures (whether temporary or permanent); or ❑ any activity which substantially interferes with normal public use of the waters regardless of cost. ♦ Floodplain Management permits and/or Critical Areas Ordinances review by Local Government for. ❑ work in frequently flooded areas, geologically unstable areas, wildlife habitats, aquifer recharge areas, and wetlands. ♦ Section 401 Water Quality Certification from the Department of Ecology under 33 USC § 1341 is needed when a federal approval is required for a project, including the following: ❑ Corps of Engineers Nationwide Permit —Send to Ecology's Environmental Review Section; ❑ FERC hydropower license —Attach FERC exhibit E and send to Ecology's Water Resources Program; and ❑ A Corps of Engineers individual permit —Send only to Corps of Engineers; the Corps will notify Ecology. ♦ Approval to Allow Temporary Exceedance of Water Quality Standards from the Department of Ecology, under 90.48 RCW, if your project results in: ❑ a temporary exceedance of water quality criteria established by WAC 173-201A for in water work (e.g., changes in turbidity from sediment disturbances and pH changes from concrete curing) — send to Ecology's regional office. NOTE: Application of aquatic herbicides and pesticides are covered by a separate application). ♦ Aquatic Resources Use Authorization Notification from the Department of Natural Resources is required if your project: ❑ is on, crosses, or impacts the bedlands, tidelands or shorelands of a navigable water. Form # JAR-P-4 ReAsed Date 12/96 Instruction Pape 1 of 2 ♦ Section 404 Permit from the Corps of Engineer under 33 USC § 1344 Is required if your project includes: 0 discharge or excavation of dredged or fill material waterward of the ordinary high water mark, or the mean higher high tide line in tidal areas, in waters of the United States, Including wetlands; .0 mechanized land clearing in waters of the United States, including wetlands. ♦ Section 10 Permit from the Corps of Engineer is required for. ❑ any work in or affecting navigable waters of the United States (e.g., floats, piers, docks, dredging, piles, buoys, overhead power lines, etc.). ♦ Section 9 Permit from the Coast Guard is required for. - - -0 construction of a new bridge or modification to an existing bridge over a navigable waterway. - --- - - - USEFUL DEFINITIONS The following definitions are presented to help applicants In completing the JARPA. They may not necessarily represent specific language from the laws Implemented through DARPA. Ordinary Nlah Water Mark or Line means the visible line on the banks where the presence and action of waters are so common as to leave a mark upon the soil or vegetation: Provided, that In any area where the ordinary high water line cannot be found the ordinary high water line adjoining saltwater shall be the line of mean higher high water and the ordinary high water line adjoining freshwater shall be the elevation of the mean annual flood. Mean Lower Low is the 0.0 tidal elevation, determined by averaging each day's lowest dde at a particular location over a period of 19 years. It Is the tidal datum for vertical tidal references In the salt water area. Mean High Water and Mean Higher High Water Tidal Elevations at any specific location can be found in tidal benchmark data compiled by the United States Department of Commerce, Environmental Science Services Administration, Coast and Geodetic Survey, dated January 24, 1979. This information can be obtained from the Corps of Engineers at (206) 764-3495. The determination of tidal elevation is obtained by averaging each day's highest tide at a particular location over a period of 19 years, measured from mean lower low water, which equals 0.0 tidal elevation. Shorelands or shoreland areas means those lands extending landward for two hundred feet in all directions as measured on a horizontal plane from the ordinary high water mark; floodways and contiguous floodplain areas landward two hundred feet from such floodways; and all wetlands and river deltas associated with the streams, lakes, and tidal waters which are subject to the provisions of 90.58 RCW. Shorelines means all water areas of the state, including reservoirs, and their associated wetlands, together with the lands underlying them, except stream segments upstream of the point where mean annual flow is less than 20 cubic feet per second, and lakes less than 20 acres in size. Wetlands means areas that are inundated or saturated by surface water or ground water at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs, and similar areas. Bridge means any structure including pipelines and conveyor belts, which transports traffic or materials across a navigable water. Instruction Page 2 of 2 JARPA FORM (la we In Wasfdrp0on state) OY PLEASE TYPE OR PRINT IN BLUE OR BLACK INK Based on the preceding checidist, I am sending copies of this application to the following: (check al that apply) -- ❑ local Government for shoreline: ❑ Substantial Development = ❑ Conditional Use -❑ Variance ❑ Exemption: or, If applicable ❑ Floodplain Management ❑ Critical Areas Ordinance ❑ Washington Department of Fish and Wildlife for HPA Washington Department of Ecology for: ❑ Approval to Allow Temporary Exceedance of Water Quality.Standards ❑ 401 Water Quality Certification Nationwide Permits ❑ Washington Department of Natural Resources for. ❑ Aquatic Resources Use Authorization Notification ❑ Corps Engineers for: ❑ Section 404 ❑ Section 10 permit ❑ Coast Guard for. ❑ Section 9 Bridge Permit SECTION A - Use for all permits covered by this application. Be sure to also complete Secdon C (Signature Block) for all permit applications. 1. APPLICANT MAILING ADDRESS WORK PHONE HOME PHONE FAX N if an agent is acting for the applicant during the permit process, complete #2. 2. AUTHORIZED AGENT MAILING ADDRESS WORK PHONE HOME PHONE FAX # 3. RELATIONSHIP OF APPLICANT TO PROPERTY: O OWNER O PURCHASER O LESSEE O OTHER: 4. NAME, ADDRESS, AND PHONE NUMBER OF PROPERTY OWNER(S), IF OTHER THAN APPLICANT: 5. LOCATION (STREET ADDRESS, INCLUDING CiTY, COUNTY AND ZIP CODE, WHERE PROPOSED ACTIVITY EXISTS OR WILL OCCUR) WATERBODY TRIBUTARY OF 1/4 SECTION TOWNSHIP RANGE GOVERNMENT LOT SHORELINE DESIGNATION ZONING DESIGNATION TAX PARCEL NO.: DNR STREAM TYPE, IF KNOWN Application Page 1 of 4 8. DESCRIBE THE CURRENT USE OF THE PROPERTY, AND STRUCTURES EXISTING ON THE PROPERTY. IF ANY PORTION OF THE PROPOSED ACTIVITY IS ALREADY COMPLETED ON THIS PROPERTY, INDICATE MONTH AND YEAR OF COMPLETION. IS THE PROPERTY AGRICULTURAL LAND? 0 YES ❑ NO ARE YOU A USDA PROGRAM PARTICIPANT? ❑ YES ❑ NO 7a. DESCRIBE THE PROPOSED WORK COMPLETE PLANS AND SPECIFICATIONS SHOULD BE PROVIDED FOR ALL WORK WATERWARD OF THE ORDINARY HIGH WATER MARK OR 1 7b. DESCRIBE THE PURPOSE OF THE PROPOSED WORK 7c. DESCRIBE THE POTENTIAL IMPACTS TO CHARACTERISTIC USES OF THE WATER BODY. THESE USES MAY INCLUDE FISH AND AQUATIC LIFE, WATER QUALITY, WATER SUPPLY, RECREATION, and AESTHETICS. IDENTIFY PROPOSED ACTIONS TO AVOID, MINIMIZE, AND MITIGATE DETRIMENTAL IMPACTS, AND PROVIDE PROPER PROTECTION PREPARATION OF DRAWINGS: SEE APPENDIX A - SAMPLE DRAWINGS AND CHECKLIST FOR COMPLETING THE DRAWINGS. ONE SET OF ORIGINAL OR GOOD QUALITY REPRODUCIBLE DRAWINGS MUST BE ATTACHED. NOTE: APPLICANTS ARE ENCOURAGED TO SUBMIT PHOTOGRAPHS OF THE PROJECT SITE, BUT THESE DO NOT SUBSTITUTE FOR DRAWINGS. THE CORPS OF ENGINEERS AND COAST GUARD REQUIRE DRAWINGS ON 8-112 X f 1 INCH SHEETS. LARGER DRAWINGS MAYBE REQUIRED BY OTHER AGENCIES 8. WILL THE PROJECT BE CONSTRUCTED IN STAGES? Cl YES ❑ NO PROPOSED STARTING DATE: ESTIMATED DURATION OF ACTIVITY: Application Page 2 of 4 9. CHECK IF ANY STRUCTURES WILL BE PLACED: O WATERWARD OF THE ORDINARY HIGH WATER MARK OR LINE FOR FRESH OR TIDAL WATERS; AND/OR O WATERWARD OF THE MEAN HIGH WATER LINE IN TIDAL WATERS 10. WILL FILL MATERIAL (ROCK, FILL, BULKHEAD, PILINGS OR OTHER MATERIAL) BE PLACED: . O WATERWARD OF THE ORDINARY HIGH WATER MARK OR LINE FOR FRESH WATERS? IF YES, VOLUME (CUBIC YARDS) /AREA (ACRES O WATERWARD OF THE MEAN HIGHER HIGH WATER FOR TIDAL WATERS? IF YES, VOLUME (CUBIC YARDS) /AREA (ACRES) 11. WILL MATERIAL BE PLACED IN WETLANDS? DYES ONO IF YES: A. IMPACTED AREA IN ACRES: B. HAS A DELINEATION BEEN COMPLETED? IF YES, PLEASE SUBMIT WITH APPLICATION- O YES O NO C. HAS A WETLAND REPORT BEEN PREPARED? IF YES, PLEASE SUBMIT WITH APPLICATION. DYES O NO 0. TYPE AND COMPOSITION OF FILL MATERIAL (E.G., SAND, ETC.): E. MATERIAL SOURCE F. UST ALL SOIL SERIES (TYPE OF SOIL) LOCATED AT THE PROJECT SITE, & INDICATE IF THEY ARE ON THE COUNTYS UST OF HYDRIC SOILS. SOILS INFORMATION CAN BE OBTAINED FROM THE NATURAL RESOURCES CONSERVATION SERVICE (MRCS): 12. WILL PROPOSED ACTIVITY CAUSE FLOODING OR DRAINING OF WETLANDS? O YES O NO IF YES, IMPACTED AREA IS _ ACRES 13. WILL EXCAVATION OR DREDGING BE REQUIRED IN WATER OR WETLANDS? DYES ONO IF YES: A. VOLUME _(CUBIC YARDS)/AREA _ (ACMES) B. COMPOSITION OF MATERIAL TO BE REMOVED: C. DISPOSAL SITE FOR EXCAVATED MATERIAL: D. METHOD OF DREDGING: 14. LIST OTHER APPLICATIONS, APPROVALS, OR CERTIFICATIONS FROM OTHER FEDERAL, STATE OR LOCAL AGENCIES FOR ANY STRUCTURES, CONSTRUCTION, DISCHARGES, OR OTHER ACTIVITIES DESCRIBED IN THE APPLICATION Q.E., PRELIMINARY PLAT APPROVAL, HEALTH DISTRICT APPROVAL, BUILDING PERMIT, SEPA REVIEW, FERC LICENSE, FOREST PRACTICES APPLICATION, ETC.) ALSO INDICATE WHETHER WORK HAS BEEN COMPLETED AND INDICATE ALL EXISTING WORK ON DRAWINGS. TYPE OF APPROVAL ISSUING AGENCY IDENTIFICATION NO. DATE OF APPLICATION DATE APPROVED COMPLETED? SEPA LEAD AGENCY SEPA DECISION: SEPA DECISION DATE: 15. HAS ANY AGENCY DENIED APPROVAL FOR THE ACTIVITY DESCRIBED HEREIN OR FOR ANY ACTIVITY DIRECTLY RELATED TO THE ACTIVITY DESCRIBED HEREIN? ❑ YES ❑ NO IF YES, EXPLAIN: Application Page 3 of 4 SECTION B - Use 11or Shorellrw and Corps of Engineers permits gip . 16. TOTAL COST OF PROJECT. THIS MEANS THE FAIR MARKET VALUE OF THE PROJECT, INCLUDING MATERIALS, LABOR, MACHINE RENTALS, ETC. 17. LOCAL GOVERNMENT WITH JURISDICTION: 18. FOR CORPS, COAST GUARD, AND DNR PERMITS, PROVIDE NAMES, ADDRESSES, AND TELEPHONE NUMBERS OF ADJOINING PROPERTY OWNERS, LESSEES, ETC. PLEASE NOTE SHORELINE MANAGEMENT COMPLIANCE MAY REQUIRE ADDITIONAL NOTICE — CONSULT YOUR LOCAL GOVERNMENT. NAME ADDRESS PHONE NUMBER SECTION C -This section MUST be completed for any permit covered by this application. 19. APPLICATION IS HEREBY MADE FOR A PERMIT OR PERMITS TO AUTHORIZE THE ACTIVITIES DESCRIBED HEREIN. I CERTIFY THAT I AM FAMILIAR WITH THE INFORMATION CONTAINED IN THIS APPLICATION, AND THAT TO THE BEST OF MY KNOWLEDGE AND BELIEF; SUCH INFORMATION IS TRUE,.COMPLETE, AND ACCURATE. I FURTHER CERTIFY THAT I POSSESS THE AUTHORITY TO UNDERTAKE THE PROPOSED ACTIVITIES.- .1 HEREBY GRANT -TO THE AGENCIES TO WHICH THIS APPLICATION IS MADE, THE RIGHT TO ENTER THE ABOVE -DESCRIBED LOCATION TO INSPECT THE PROPOSED, IN -PROGRESS OR COMPLETED WORK 1 AGREE TO START WORK ONLY AFTER ALL NECESSARY PERMITS HAVE BEEN RECEIVED. SIGNATURE OF APPLICANT OR AUTHORIZED AGENT DATE I HEREBY DESIGNATE TO ACT AS MY AGENT IN MATTERS RELATED TO THIS APPLICATION FOR PERMIT(S). I UNDERSTAND THAT IF A FEDERAL PERMIT IS ISSUED, I MUST SIGN THE PERMIT. SIGNATURE OF APPLICANT DATE SIGNATURE OF LANDOWNER (EXCEPT PUBLIC ENTITY LANDOWNERS, E.G. DNR) DATE THIS APPLICATION MUST BE SIGNED BY THE APPLICANT AND THE AGENT, IF AN AUTHORIZED AGENT IS DESIGNATED. 18 U.S.0 §1001 provides that Whoever. In any manner within the Jurisdiction of any department or agency of the United States knowingly falsifies, conceals, or covers up by any trick scheme, or device a material fad or makes any false, fictitious, or fraudulent statements or representations or makes or uses any false writing or document knowing same to contain any false, fictitious, or fraudulent statement or entry, shall be fined not more than $10,000 or imprisoned not more than 5 years or both. These Agencies are Equal Opportunity end AtllnnabW Action employee For special accorrwnodation needs, please contact the epprolodate agency from Appena9x B. Application Page 4 of 4 APPENDIX A: GUIDANCE CHECKLIST FOR COMPLETION OF DRAWINGS General Information. Three types of illustrations are needed to properly depict the proposed activity: Vicinity Map, Plan -View, and Cross -Sectional View. Drawings to scale should be prepared using clear printing, black ink, and the fewest number of sheets possible. Include the scale. The importance of clear accurate drawings cannot be overstated. At a minimum, drawings must contain the following information; other information may be required depending on project type. If you have questions regarding completing the drawings, call the appropriate agency. 1. Vicinity Mai). A copy of a county or city road map, or a U.S. Geological Survey topographic map may be used. Include: () a. North arrow. -O ------..b. Name of waterbody (and river mile if appropriate). () C. Location of the proposed activity (indicate with a circle, arrow, X, or similar symbol). () d. Provide latitude and longitude of the site to the nearest second. () e. Provide directions to the site. 2. Plan View. This drawing illustrates the proposed project area as if you were looking down at the site from overhead. () a. North arrow. () b. Name of waterbody and direction of water flow. () C. Location of existing shoreline. Tidal Waters: Show the Ordinary High, Mean High, Mean Low, Mean Higher High, and Mean Lower Low Water Marks or Lines, and/or wetland boundaries. Indicate elevation above datum. Non -tidal waters: Show the Ordinary High Water Mark or Line, -Meander. Line, and/or wetland boundary. () d. Dimensions of the activity or structure and impervious surfaces, distance from property lines,.and.the distance it extends into the waterbody beyond the Ordinary High, Mean High, Mean Higher High, and Mean Low Water Mark or Line, and/or wetland boundaries, as appropriate. () e. For Corps permits, indicate the distance to Federal projects and/or navigation channels (if applicable). To ascertain, call the Corps Regulatory Branch Office at (206) 764-3495. () f. Show existing structures on subject and adjoining properties. () g. Indicate adjoining property ownership. () h. If fill material is to be placed, identify the type of material, amount of material (cubic yards), and area to be filled (acres). () i. If project involves dredging, identify the type of material, amount of material (cubic yards), area to be dredged, method of dredging, and location of disposal site. Dredging in areas shallower than -10 feet needs to be clearly identified on drawings. () j. Identify any part of the activity that has been completed. () k. Indicate types and location of aquatic, wetland, and riparian vegetation. () I. Erosion control measures, stabilization of disturbed areas, etc. () M. Utilities, including water, sanitary sewer, power and stormwater conveyance systems (e.g., bioswales). () n. Indicate stormwater discharge points. 3. Cross -Sectional View. This drawing illustrates the proposed activity as if it were cut from the side and/or front. Include: () a. Location of water lines. Tidal Waters: Show the Ordinary High, Mean High, Mean Higher High, and Mean Lower Low Water Marks or Lines, . and/or wetland boundary. Non -tidal waters: Show the Ordinary High Water Mark or Line, and/or wetland boundary. () b. Water depth or tidal elevation at waterward face of project. () C. Dimensions of the activity or structure, and the distance it extends into the waterbody beyond the Ordinary High, the Mean High, the Mean Higher High and Mean Low Water Mark or Line, and/or wetland boundaries. () d. Indicate dredge and/or fill grades as appropriate. () e. Indicate existing and proposed contours and elevations. () f. Indicate types and location of aquatic, wetland, and riparian vegetation present on site. () g. Indicate type and location of material used in construction and method of construction. () h. Indicate height of structure. 4. Clearance and Elevations. Applies to Coast Guard Bridge Permits only. () a. Vertical clearance measured from Mean Higher (tidal waters) or Ordinary High (non -tidal water). () b. Horizontal clearance between piers or pilings. () C. Bottom elevation of the waterway at the bridge. Appendix A-1 Ba3TDQ \e c PUR ` Z �. coD .� \ \ ` UM 9EP9emkATE CN . PERIIT \ LM OMAE S `� P ` FACE CF AT Cl) 3 E)Q3TD40 PI6i TO BE MOVED - -- - LU CC J PROP09® � � 32'-�(or PIER PfVp'09E� 30` - . j 0' h• FLOAT PSGOSED SLWED LOVBCAT PLATFCM ` 31Y 4• 20' - C' mi 6ao m PROPOSED 11'- 6• %% PIER ADOMON \ `----=-----------� EKISTD43 PIM PLAN VIEW 0 20 40 eo so 100 . PIFoSr--: PR0'YIDE PMATE BUT WMkGE OATEN: C.O.E. 0.0' EST 1912 vlok} Fin � �{ Bast •— — / NOTE: E aSTT26 PIM TO BE FE YES tV NEV PIER TO BE LDGTED ON On $ E OF PITY. EXISTD40 HOOD BS LKWJZ TO BE MOVED kC fEPLJACED IMM SEPARATE PEF#CT. L LEGAL DESCRIPTION LOT-8 a-=- PLAT-AIm ADD FORM 90 BS ON S IN 194.55 FT V Cr- SE MR TR TH N 10 OES 53 KIN 00 SEC E 30 FT TH 92 DE'B 55 ► IN 00 SEC V TO Lx WA% TH SLY ALS Lx TO 3 L N OF d TH E TO BES LOT-7-8 BLDCK- PLAT-fOAJM ADO ROANS ADD POR BB SE CDR a TH V ALS S LN 194.S5 FT TH N 1E DES 53 gym+ 00 SEC E 30 FT TO TPOS TH CONTB N 18 DES 53 KIN OO SEC E 50 FT TH N 63 DES 18 MIN 00 SEC 1r TO LK WASH TH SLY AW LK. TO PT x .72 DES 5:5 KIN 00 SEC V OF c�o� TRLE BB TH S 72 DES 55 M 00 SEC E JN� TO TPOB & SH LDS ADJ JOB IWE: - Mtruf Z'1C" KkrUN3 AOOPESS: 14. �_,I ►`•� me= 014 AT: MSKER MAW COLN Y OF:KM STATE:VA%CMTOH AM. BY: -'Zkw%fty Jr. q -Up OI MC. t K i nlTc. R/10-MA S�.MPc v�CtN� P MaP A-2 1 N LjA,e• -S<OPM OJT PLATPYA a' Rat@' - 0' i Hill 20 79' - 2 Vr PIER PLAN o io EXISTING PIE; TO BE FEMOVED W/ NEW. PIS TO BE LOCATED ON SWTH SIDE OF PPfPERTY. EXISTING VOOD BlMEAD TO BE F&cY® go FEPL&M t DER SEPARATE PBf KIT. PFCPOSED BJJOfAD FSVZDENT uDER SEPAXTE PBVilT — LDE OF O.H.W.. AT / ow 73 EXISTING Buuo-E4Z r 21.es• LAt2: J . BOTTOM ELEVATION VIEW OF 10 1 PLC' 51TE PLAN PROPOSB: REMOVE AND REPLACE EXISTING PIER V/ NEW PIER AT NEW LOCATION Di: L E WASHD43TON AT: l WER I1JA COIMY OF:KDA STATE: rASKMTDK APPL• 6Y: y -up PARE: DATE: ORYH o \ ` It ,\ d O' a � WAr6k MA", \ O b � \ c. SAMPL.� SMS � A "=. 6 of (R,esrAuR Arr PRo?o,&4LJ �� 'Fi KYO2 t ovurv, WA . v NAw Yl ';'� $ 3 AU � ARKIJJQ* r I T- 3 6Ol Oaoa.J)/Y 141YA wATL-t.. MAU 5 AA PLZ . Stir- IDILA�j C Ss 3ECT70A)s �i2�sT•�'J 2A�" '� �.cY�a t,4,lA. THURSTON_ COUNTY LEWIS COUNTY BLUE CREEK W CENTRALIA E-�0 (co Ryry . AI 5Q Q Big rp�•a►-�Tz o HATCHERY sc HEHALIS ° SITE . ° ° �a 6 O SOUTH WELL r .FIELD NAPAVINE MOSSYROCK \ Z MARY'S CORNER �� %�-'•. r ETHEL 2 SAINT URBAN ~ J v o: '�MAYFIELD Lu WINLOCK ~ � RIVER MAYFIELD DAM / l TOLEDO `--HATCHERY SITF- RAT: 'W Z,t' 3G" �oUG: 122° 3N' Sz" _LEWIS COUNTY COWLITZ COUNTY STATUTE MILES 5 0 5 VIolt/JIN MAP LOCATIONNICINIT'Y MAP FIGURE D A -6 wET�-AaD E�Ccra�rATiuN (3.�JAc� AD7Acc5"—, Pfr--?L'RYY o-3-3rl W5 LJ U.S. V .7'o,J.v ADA✓15 0 IN AT COUNTY OF STATE APPLICATION BY SHZET OF VATE F CI--, •.w p "I •a am some {M 00'0 •Y iY 240 w 00 •0 • M y0 W •N W We 4" KO SECflON A -A \ no � a � m existing wattend �4.1-42.nnC pro IXC .md excavntipn vcn-0a3. �... H •M IA 0+0 .Oi axe 300 000 iN 1,3 6• o • •y M 1a0 HO •ei •:-0 �:O SECTKit'i S-m C RADH tkW00;63 Ri� w c_ ►m AMA x7 olln0 potlu>d G�-EarLCRE£K (Exr�r U4i •O7 !sa •at fu ►» ova ttA HO fea .» i00 aef f,1 f:1 t» W • N tt7 iW 1.0 "1 *0 4" SECTION C-C not PROFOSM FILL V4 AT COLNry OO CTATE %7A At'suCA'no?; riv �-J i /— Poccd or Po*kc d Pia rw i In h R� Width 0..y LIE ft"' ,�d"c��" fie r1bPiod. rrod. (rvla% Fli Dlsf&= to Properly LJae ! � rmvac 17W roff."Iv. 1. Luclj m of orpN Ord Htt t,-1 On the ©emb, Oo4 or td-Jinj V w& Pm-9icn ViLaV - OD ro Zr Tic Type of Pioldoon �. Pa eloge d Az Plod rW IWo 6rmnd Oid W#Hrt ft x Peach A -cc (Above Edrem LcwWdoff zThr Tjpe enj Lcczd/on of rr cnd/crvl Haat Vo�joor► �.Mvbe7 wd Tjpc of Pdlrq. TWiiS IS AN EXA.".IPLE OF. THE INFORMATION REQUIRED PRDVtnc UtAlEYtSIONS,DETAILS Ct SPECIFICATIONS AS APPROPRIATE FOR PROTVSCO PROJECT. COUNTY OF APPUCATION 13Y PROJECT ADDRESS; SHECT OF DATE A r rjj, • . � P1-1 VIEW t'c of Crhllrq Nd�,d ea-v,= Tid d Clcvd lo, N Toc ofWdovod Fax (l7LLW-ODFL) Noted Pco�:h &odc D of nanc Pock ®doe l�(dv{d Pco h adc 1)1::4a= FronWdarord Fox To Tcc of Ndurd DonYir-- GIr`O55 5r`GrION `- rxi:firal Ndurd — Pc&lre ProvidcThc Fdlcvirq 1. The Locdlon of OrMl r tit irlW on 6cnzh Pai or Csl-flnl pai Prdcdkx► (llWV - OD FO Tprl-,. . POCK INX-MrAD CION OLKArION COUNTY OF APr UV.TION QY THIS IS AN EXAMPLE OF THE tMFORLIATION REQUIRED PROVIDE DIMENSIONS.DETAILS & SPECIFICATIO+IS AS APPROPRIATE FOR PROPOSED PROJECT. PROJECT ADDRESS: SHEET OF DATE A w APPENDIX B: AGENCY CONTACTS Below is a list of agencies to which a copy of the Joint Application may be sent, and which permit each agency issues. Technical assistance and information is also available from these offices. Department of the Army Permit (Section 404 or Section 10) U.S. Army Corps of Engineers, Seattle District Regulatory Branch Post Office Box 3755 —. - Seattle, WA 98124-2255 U.S. Army Corps of Engineers Eastern Washington Information U.S. Army Corps of Engineers Central Washington Information Telephone (206) 764-3495 FAX (206) 764-6602 Telephone (509) 2384570 FAX (509) 2384570 Telephone (509) 682-7010 FAX (509) 682-7710 Department of Ecology Permits (401 and Approval to Exceed Water Quality Standards) Washington State Department of Ecology 300 Desmond Drive Post Office Box 47600 Olympia, WA 98504-7600 Central Region Eastern Region Northwest Region Southwest Region Telephone (360) 407-7037 FAX (360) 407-6904 Telephone (509) 558-2800 FAX (509) 550-2809 Telephone (509) 545-2926 FAX (509) 595-6175 Telephone (206) 354-7000 FAX (206) 354-7098 Telephone (360) 407-6300 FAX (360) 407-6305 Department of Fish and Wildlife (Hydraulic Project Approval) - Submit all HPA applications to Headquarters. Contact regional offices for questions or assistance. Headquarters Washington State Department of Fish and Wildlife Telephone (360) 902-2534 600 Capitol Way North TDD (360) 902-2207 Olympia, Washington 98501-1091 FAX (360) 902-2946 Region 1 (Pend Oreille, Ferry, Stevens, Spokane, Lincoln, Whitman, Columbia, Garfield, Asotin, and Walla Walla Counties) Washington State Department of Fish and Wildlife Telephone (509) 4564082 Region 1 FAX (509) 456-4071 8702 North Division Street Spokane, WA 99218-1199 Region 2 (Okanogan, Douglas, Grant, Adams, and Franklin Counties) Washington State Department of Fish and Wildlife Telephone (509) 754-4624 Region 2 FAX (509) 754-5257 1550 Alder Street NW Ephrata, WA 98823-9652 Appendix B-i Region 3 (Chelan, Kittitas, Yakima, and Benton Counties) Washington State Department of Fish and Wildlife Telephone (509) 575-2740 . Region 3 FAX (509) 575-2474 1701 South 24th Avenue Yakima, WA 98902-5720 Region 4 (Whatcom, Skagit, Snohomish,King, Pierce, Island, and San Juan Counties) Washington State Department of Fish and Wildlife Telephone (206) 775-311 Region 4 FAX (206) 338-1066 16019 Mill Creek Boulevard Mill Creek, WA 98012-1296 Region 5 (Lewis, Wahkiakum, Cowlitz, Skamania, Clark, and Klickitat Counties) Washington State Department of Fish and Wildlife Telephone (306) 696-6211 Region 5 FAX (360) 690-7238 5404 NE Hazel Dell Ave. Vancouver, WA 98663-1299 Region 6 (Pacific, Thurston, Grays Harbor, Mason, Jefferson, Clallam; and Kitsap Counties) Washington State Department of Fish and Wildlife Telephone (360) 249-6522 Region 6 FAX (360) 664-0689 48 Devonshire Road f Montesano, WA 98563-9618 Local Government (Shoreline Management Act Approval) Appropriate City or County Planning, Building, or Community Development Department Natural Resources Conservation Service (NRCS), formerly Soil Conservation Service (SCS) for information regarding activities on agricultural land) NRCS Telephone (509) 353-2335 Suite 450 Rock Point Tower Two West 316 Boone Avenue Spokane, WA 99201-2348 Coast Guard (Section 9 Bridge Permit) Commander 13th Coast Guard District (OAN) Telephone (206) 220-7282 915 Second Avenue Seattle, WA 98174-1067 Attn: Austin Pratt Department of Natural Resources Aquatic Resources regarding authorization to use bedlands, tidelands, or shorelands of navigable waters. Central Region Northwest Region Southwest Region South Puget Sound Region Northeast Region Southeast Region Olympic Region Headquarters Telephone (360) 748-2383 Telephone (360) 856-3500 Telephone (360) 577-2025 Telephone (360) 825-1631 Telephone (590) 925-8510 Telephone (509) 925-8510 Telephone (360) 374-6131 Telephone (360) 902-1100 Appendix &2 CITY OF RENTON MEMORANDUM Date: February 15, 2000 RECEIVED To: John Hobson/Utilities Department F ' � ' 2000 ITY From: Lesley Nishihira/Development Planning CITILITCYSYS EM�SN Subject: Higate Lift Station Project No. LUA-99-088,ECF The Development Planning Section of the City of Renton has received the above -referenced application for environmental review. A presentation of the proposed amendment to the Environmental Review Committee (ERC) is scheduled for March 7, 2000. At that meeting, I will present staff recommendations for the Committee's review and environmental determination. Following the ERC meeting, I will send you copies of the ERC determination along with the timeframes for the public comment and appeal periods for your files. Please provide a charge number for the publication of the environmental determination. acceptmemo WASHINGTON JOINT AQUATIC RESOURCE PERMITS APPLICATION (JARPA) INSTRUCTIONS, SAMPLE DRAWINGS & AGENCY CONTACTS NOTE.• DO NOT SUBM/T this Section with your application. This Joint Application may be used to apply for Hydraulic Project Approvals, Shoreline Management Permits, Approvals for Exceedance of Water Quality Standards, Water Quality Certifications, Coast Guard Bridge Permits, Department of Natural Resources Use Authorization, and Army Corps of Engineers Permits. You must submit readable copies of the completed application form together with detailed drawings, prepared in accordance with the drawing guidance to the appropriate agencies. When applying, you do NOT need to send copies of the instructions. Remember, depending on the type of project you are proposing, other permits maybe required that are not covered by this application. d. Use the following list to determine which permits to apply for. Your project may require some or all of these permits. If you have trouble deciding which permits you need, please contact the appropriate agency for questions. Agency telephone numbers are attached. IF ANY OF THE BOXED ITEMS LISTED UNDER A PERMIT TITLE BELOW APPLY TO YOUR PROJECT, THEN YOU MUST CHECK THE BOX FOR THAT PERMIT ON THE TOP OF PAGE ONE OF THE JARPA FORM. Complete Sections A & C for any of the permits listed below. Also complete Section B for Shoreline and Army Corps of Engineers permits. Detailed drawings are required for any of these permits (see attached drawing guidelines for drawing requirements). ❑ Hydraulic Project Approval from the Department of Fish and Wildlife under 75.20 RCW is required if your project includes construction or other work, that: • will use, divert, obstruct, or change the natural flow or bed of any fresh or salt water of the state. This includes all construction or other work waterward and over the ordinary high water line, including dry channels, and may include projects landward of the ordinary high water line (e.g., activities outside the ordinary high water line that will directly impact fish life and habitat, falling trees into streams or lakes, etc.). ❑ Shoreline Substantial Development, Conditional Use, Variance Permit, or Exemption from Local Government (under the Shoreline Management Act, 90.58 RCW;) required for work or activity in the 100-year floodplain, or within 200 feet of the ordinary high water mark of Shorelines of the State (check with your local government); and which includes any one of the following: • dumping, • drilling, • dredging; • filling; • placement or alteration of structures (whether temporary or permanent); or • any activity which substantially interferes with normal public use of the waters regardless of cost. ❑ Floodplain Management Permits and/or Critical Areas Ordinances review by Local Government for: • work in frequently flooded areas, geologically unstable areas, wildlife habitats, aquifer recharge areas, and wetlands. ❑ Section 401 Water Quality Certification from your Department of Ecology Regional office under 33 USC § 1341 is needed when a federal approval is required for a project, including the following: • Corps of Engineers Nationwide Permit or Industrial Permit --Send to Ecology's Regional Federal Permits Unit; in the Regional Office; • FERC hydropower license --Attach FERC exhibit E and send to Ecology's Water Resources Program; and ❑ Aquatic Resources Use Authorization Notification from the Department of Natural Resources is required if your project: • is on, crosses, or impacts the bedlands, tidelands or shorelands of a navigable water. u Section 404 Permit from the Corps of Engineer under 33 USC § 1344 is required if your project includes: • placement of dredged or fill material waterward of the ordinary high water mark, or the mean higher high tide line in tidal areas, in waters of the United States, including wetlands; mechanized land clearing and sidecasting in waters of the United States, including wetlands. JARPA, Revised 12/98, contact Ecology's Permit Assistance Center for latest version, 360/407-7037 Pace 1 of 4 • , Endangered Species Act (ESA) Consultation ❑ Section 10 Permit from the Corps of Engineer is required for: • any work in or affecting navigable waters of the United States (e.g., floats, piers, docks, dredging, excavation, piling, buoys, overhead power lines, etc.). ❑ Section 9 Permit from the Coast Guard is required for: • construction of a new bridge or modification to an existing bridge over a navigable waterway. USEFUL DEFINITIONS The following definitions are presented to help applicants in completing the DARPA. They may not necessarily represent specific language from the laws implemented through JARPA. Ordinary High Water Mark or Line means the visible line on the banks where the presence and action of waters are so common as to leave a mark upon the soil or vegetation: Provided, that in any area where the ordinary high water line cannot be found the ordinary high water line adjoining saltwater shall be the line of mean higher high water and the ordinary high water line adjoining freshwater shall be the elevation of the mean annual flood. Mean Lower Low is the 0.0 tidal elevation, determined by averaging each day's lowest tide at a particular location over a period of 19 years. It is the tidal datum for vertical tidal references in the salt water area. Mean High Water and Mean Higher High Water Tidal Elevations at any specific location can be found in tidal benchmark data compiled by the United States Department of Commerce, Environmental Science Services Administration, Coast and Geodetic Survey, dated January 24, 1979. This information can be obtained from the Corps of Engineers at (206) 764-3495. The determination of tidal elevation is obtained by averaging each day's highest tide at a particular location over a period of 19 years, measured from mean lower low water, which equals 0.0 tidal elevation. Shorelands or shoreland areas means those lands extending landward for two hundred feet in all directions as measured on a horizontal plane from the ordinary high water mark; floodways and contiguous floodplain areas landward two hundred feet from such floodways; and all wetlands and river deltas associated with the streams, lakes, and tidal waters which are subject to the provisions of 90.58 RCW. Shorelines means all water areas of the state, including reservoirs, and their associated wetlands, together with the lands underlying them, except stream segments upstream of the point where mean annual flow is less than 20 cubic feet per second, and lakes less than 20 acres in size. Wetlands means areas that are inundated or saturated by surface water or ground water at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs, and similar areas. Bridge means any structure including pipelines and conveyor belts, which transports traffic or materials across a navigable water. Aquatic Tidelands means the area between the ordinary high tide line and extreme low tide line, unless otherwise established. Aquatic Shorelands means the shore areas of non -tidal navigable lakes or rivers between the ordinary high water line and the line of navigability unless otherwise established. Aquatic Bedlands means the area waterward of and below the line of navigability on non -tidal rivers and lakes, or below the extreme low tide mark in navigable tidal waters, or below the outer harbor line where a harbor has been created. Nationwide Permit issued by the Corps of Engineers for projects with minimal impacts. For a complete packet of nationwide permits and application information, contact the Corps Regulatory branch at (206) 764-3495. JARPA, Revised 12/98, contact Ecology's Permit Assistance Center for latest version, 360/407-7037 Page 2 of 4 GUIDANCE FOR COMPLETION OF DRAWINGS General Information. Three types of illustrations are needed to properly depict the proposed activity: Vicinity Map, Plan View, and Cross -Sectional View. Drawings to scale should be prepared using clear printing, black ink, and the fewest number of sheets possible. Include the scale. The importance of clear accurate drawings cannot be overstated. At a minimum, drawings must contain the following information; other information may be required depending on project type. If you have questions regarding completing the drawings, call the appropriate agency. 1. Vicinity Map. A copy of a county or city road map, or a U.S. Geological Survey topographic map may be used. Include: a. North arrow. b. Name of waterbody (and river mile if appropriate). C. Location of the proposed activity (indicate with a circle, arrow, X, or similar symbol). d. Provide latitude and longitude of the site to the nearest second. e. Provide directions to the site. 2. Plan View. This drawing illustrates the proposed project area as if you were looking down at the site from overhead. a. North arrow. b. Name of waterbody and direction of water flow. C. Location of existing shoreline. Tidal Waters: Show the Ordinary High, Mean High, Mean Low, Mean Higher High, and Mean Lower Low Water Marks or Lines, and/or wetland boundaries. Indicate elevation above datum. Non -tidal waters: Show the Ordinary High Water Mark or Line, Meander Line, and/or wetland boundary. d. Dimensions of the activity or structure and impervious surfaces, distance from property lines, and the distance it extends into the waterbody beyond the Ordinary High, Mean High, Mean Higher High, and Mean Low Water Mark or Line, and/or wetland boundaries, as appropriate. e. For Corps permits, indicate the distance to Federal projects and/or navigation channels (if applicable). To ascertain, call the Corps Regulatory Branch Office at (206) 764-3495. f. Show existing structures on subject and adjoining properties. g. Indicate adjoining property ownership. h. If fill material is to be placed, identify the type of material, amount of material (cubic yards), and area to be filled (acres). i. If project involves dredging, identify the type of material, amount of material (cubic yards), area to be dredged, method of dredging, and location of disposal site. Dredging in areas shallower than -10 feet needs to be clearly identified on drawings. j. Identify any part of the activity that has been completed. k. Indicate types and location of aquatic, wetland, riparian and upland vegetation. I. Erosion control measures, stabilization of disturbed areas, etc. M. Utilities, including water, sanitary sewer, power and stormwater conveyance systems (e.g., bioswales). n. Indicate stormwater discharge points. o. Proposed landscaping where applicable (for complex landscape plans, please attach a separate drawing). P. Where applicable, plans for development of areas on or off site as mitigation for impacts associated with the proposal. q. On all variance applications the plans shall clearly indicate where development could occur without approval of a variance, the physical features and circumstances on the property that provide a basis for the request, and the location of adjacent structures and uses. Cross -Sectional View. This drawing illustrates the proposed activity as if it were cut from the side and/or front. Include: a. Location of water lines. Tidal Waters: Show the Ordinary High, Mean High, Mean Higher High, and Mean Lower Low Water Marks or Lines, and/or wetland boundary. Non -tidal waters: Show the Ordinary High Water Mark or Line, and/or wetland boundary. b. Water depth or tidal elevation at waterward face of project. C. Dimensions of the activity or structure, and the distance it extends into the waterbody beyond the Ordinary High, the Mean High, the Mean Higher High and Mean Low Water Mark or Line, and/or wetland boundaries. d. Indicate dredge and/or fill grades as appropriate. e. Indicate existing and proposed contours and elevations. f. Indicate types and location of aquatic, wetland, and riparian vegetation present on site. g. Indicate type and location of material used in construction and method of construction. h. Indicate height of structure. 4. Clearance and Elevations. Applies to Coast Guard Bridge Permits only. a. Vertical clearance measured from Mean Higher (tidal waters) or Ordinary High (non -tidal water). b. Horizontal clearance between piers or pilings. C. Bottom elevation of the waterway at the bridge. AGENCY CONTACTS Below is a list of agencies to which a copy of the Joint Application may be sent, and which permit each agency issues. Technical assistance and information is also available from these offices. Department of the Army Permit (Section 404 or Section 10) U.S. Army Corps of Engineers, Seattle District Regulatory Branch Post Office Box 3755 Seattle. WA 98124-2255 U.S. Army Corps of Engineers Eastern Washington Information P.O. Box 273 Chattaroy, WA 99003-0273 U.S. Army Corps of Engineers Central Washington Information P.O. Box 2829 Chelan, WA 98816-2829 Department of Ecology Permits — 401 Water Quality Certification Washington State Department of Ecology — Headquarters 300 Desmond Drive, Lacey Post Office Box 47600 Olympia, WA 98504-7600 Central Region 15 West Yakima Avenue, Ste 200 Yakima, WA 98902-3401 Eastern Region 4601 North Monroe, Suite 202 Spokane, WA 99205-1295 Northwest Region 3190 - 160th Avenue S.E. Bellevue. WA 98008-5452 Southwest Region Mailing Address: P.O. Box 47775 Olympia, WA 98504-7775 Physical Address 300 Desmond Drive Lacey, WA 98504 Telephone (206) 764-3495 FAX (206) 764-6602 Telephone (509) 238-4570 FAX (509) 238-4570 Telephone (509) 682-7010 FAX (509) 682-7710 Permit Assistance Center Telephone (360) 407-7037 FAX (360) 407-6904 Telephone (509) 575-2490 FAX (509) 575-2809 Telephone (509) 456-2926 FAX (509) 456-6175 Telephone (425) 649-7000 FAX (425) 649-7098 Telephone (360) 407-6300 FAX (360) 407-6305 Department of Fish and Wildlife (Hydraulic Project Approval) - Submit 3 copies of the JARPA application to Regional offices. Contact regional offices for questions or assistance. Headquarters Washington State Department of Fish and Wildlife 600 Capitol Way North Olympia, Washington 98501-1091 Region 1 (Pend Oreille, Ferry, Stevens, Spokane, Lincoln, Washington State Department of Fish and Wildlife 8702 North Division Street Spokane, WA 99218-1199 Telephone (360) 902-2534 TDD (360) 902-2207 FAX (360) 902-2946 Whitman, Columbia, Garfield, Asotin, and Walla Walla Counties) Telephone (509) 456-4082 FAX (509) 456-4071 Region 2 (Okanogan, Douglas, Grant, Adams, and Franklin Counties) Washington State Department of Fish and Wildlife Telephone (509) 754-4624 1550 Alder Street NW FAX (509) 754-5257 Ephrata, WA 98823-9652 Region 3 (Chelan, Kittitas, Yakima, and Benton Counties) Washington State Department of Fish and Wildlife Telephone (509) 575-2740 1701 South 24th Avenue FAX (509) 575-2474 Yakima. WA 98902-5720 Region 4 (Whatcom, Skagit, Snohomish, King, Island, and San Juan Counties) Washington State Department of Fish and Wildlife Telephone (425) 775-1311 16019 Mill Creek Boulevard FAX (425) 338-1066 Mill Creek, WA 98012-1296 Region 5 (Lewis, Wahkiakum, Cowlitz, Skamania, Clark, and Klickitat Counties) Washington State Department of Fish and Wildlife Telephone (360) 696-6211 2108 Grand Blvd. FAX (360) 906-6777 Vancouver, WA 98663-1299 Region 6 (Pacific, Pierce, Thurston, Grays Harbor, Mason, Jefferson, Clallam, and Kitsap Counties) Washington State Department of Fish and Wildlife Telephone (360) 249-6522 48 Devonshire Road FAX (360) 664-0689 Montesano, WA 98563-9618 Local Government (Shoreline Management Act Approval) Appropriate City or County Planning, Building, or Community Development Department Natural Resources Conservation Service (NRC agricultural land NRCS Suite 450 Rock Point Tower Two West 316 Boone Avenue Spokane, WA 99201-2348 Coast Guard (Section 9 Bridge Permit) formerly Soil Conservation Service (SCS) for information regarding activities on Telephone (509) 353-2335 Commander 13th Coast Guard District (OAN) Telephone (206) 220-7282 915 Second Avenue Seattle, WA 98174-1067 Attn: Austin Pratt Department of Natural Resources, Aquatic Resources Authorization to use bedlands, tidelands, or shorelands of navigable waters. Central Region Northwest Region Southwest Region South Puget Sound Region Northeast Region Southeast Region Olympic Region Headquarters US Fish and Wildlife Service, Endangered Species Act consultation Eastern Washington Telephone (360) 748-2383 Telephone (360) 856-3500 Telephone (360) 577-2025 Telephone (360) 825-1631 Telephone (509) 925-8510 Telephone (509) 925-8510 Telephone (360) 374-6131 Telephone (360) 902-1100 Telephone (509) 765-6125 Western Washington Telephone (360) 753-5835 CITY OF RENTON MEMORANDUM Date: April 3, 2000 To: John Hobson/Utilities Department From: Lesley Nishihira/Development Planning1l Subject: Higate Lift Station Project No. LUA-99-088,ECF This letter is written on behalf of the Environmental Review Committee (ERC) and is to advise you that the comment and appeal periods have ended for the Environmental Review Committee's (ERC) Determination of Non -Significance - Mitigated for the above -referenced project. No appeals were filed on the ERC determination. This decision is final and application for the appropriately required permits may proceed. The applicant must comply with all ERC Mitigation Measures. If you have any questions or desire clarification of the above, please call me at (425) 430-7270 (inalmemo CITY OF RENTON MEMORANDUM Date: March 9, 2000 To: John Hobson/Utilities Department From: Lesley Nishihira/Development Planning RECEDED Subject: Higate Lift Station MAR 1 V C Project No. LUA-99-088,ECF 9 ��0`r) CITY OF RE44A0, SYSTEM, This letter is written on behalf of the Environmental Review Committee (ERC) and is to advise you that they have completed their review of the subject project. The ERC, on March 7, 2000, issued a threshold Determination of Non -Significance -Mitigated with Mitigation Measures. See the enclosed Mitigation Measures document. Appeals of the environmental determination must be filed in writing on or before 5:00 PM March 27, 2000. Appeals must be filed in writing together with the required $75.00 application fee with: Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA 98055. Appeals to the Examiner are governed by City of Renton Municipal Code Section 4-8-11 B. Additional information regarding the appeal process may be obtained from the Renton City Clerk's Office, (425) 430-6510. If you have any questions or desire clarification of the above, please call me at (425) 430-7270. Encl. acre W,emp CITY OF RENTON MEMORANDUM Date: March 9, 2000 To: John Hobson/Utilities Department From: Lesley Nishihira/Development Planning Subject: Higate Lift Station Project No. LUA-99-088,ECF This letter is written on behalf of the Environmental Review Committee (ERC) and is to advise you that they have completed their review of the subject project. The ERC, on March 7, 2000, issued a threshold Determination of Non -Significance -Mitigated with Mitigation Measures. See the enclosed Mitigation Measures document. Appeals of the environmental determination must be filed in writing on or before 5:00 PM March 27, 2000. Appeals must be filed in writing together with the required $75.00 application fee with: Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA 98055. Appeals to the Examiner are governed by City of Renton Municipal Code Section 4-8-11 B. Additional information regarding the appeal process may be obtained from the Renton City Clerk's Office, (425) 430-6510. If you have any questions or desire clarification of the above, please call me at (425) 430-7270. Encl. acceplmemo CITY OF RENTON z4 DEVELOPMENT SERVICES DIVISION f { {EkNY��I-R ,"NMSCHECKLIST77- PURPOSE OF CHECKLIST: The State Environmental Policy Act (SEPA), Chapter 43.21 C RCW, requires all governmental agencies to consider the environmental impacts of a proposal before making decisions. An Environmental Impact Statement (EIS) must be prepared for all proposals with probable significant adverse impacts on the quality of the environment. The purpose of this checklist is to provide information to help you and the agency identify impacts from your proposal (and to reduce or avoid impacts from the proposal, if it can be done) and to help the agency decide whether an EIS is required. INSTRUCTIONS FOR APPLICANTS: This environmental checklist asks you to describe some basic information about your proposal. Governmental agencies use this checklist to determine whether the environmental impacts of your proposal are significant, requiring preparation of an EIS. Answer the questions briefly, with the most precise information known, or give the best description you can. You must answer each question accurately and carefully, to the best of your knowledge. In most cases, you should be able to answer the questions from your own observations or project plans without the need to hire experts. If you really do not know the answer, or if a question does not apply to your proposal, write "do not know" or "does not apply". Complete answers to the questions now may avoid unnecessary delays later. Some questions ask about governmental regulations, such as zoning, shoreline, and landmark designations. Answer these questions if you can. If you have problems, the governmental agencies can assist you. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of time or on different parcels of land. Attach any additional information that will help describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. USE OF CHECKLIST FOR NONPROJECT PROPOSALS: Complete this checklist for nonproject proposals, even though questions may be answered "does not apply." IN ADDITION, complete the SUPPLEMENTAL SHEET FOR NONPROJECT ACTIONS (part D). For nonproject actions (actions involving decisions on policies, plans and programs), the references in the checklist to the words "project," "applicant," and "property or site" should be read as "proposal," "proposer," and "affected geographic area," respectively. Higate Lift Station Elimination Environmental Checklist Ell 1 2. 9 4 5 C: 7 N 91 10. BACKGROUND Name of proposed project, if applicable: Higate Lift Station Elimination Name of applicant: City of Renton - Wastewater Utility Address and phone number of applicant and contact person: 1055 South Grady Way Renton, WA 98055 Date checklist prepared. - January 31, 2000 Agency requesting checklist: City of Renton Contact: John Hobson - (425) 430-7279 Proposed timing or schedule (including phasing, if applicable): Project will be bid in May, 2000 with construction beginning in July, 2000. Completion of construction is estimated for October, 2000. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. No. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. A wetland delineation report was prepared by Entranco in December 1996 for this project. A follow-up site review and letter was provided on August 16, 1999 by Entranco to confirm that their 1996 is still valid (this letter is included). A geotechnical report was prepared by Golder and Associates dated January 12, 2000. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. None List any governmental approvals or permits that will be needed for your proposal, if known. The project may require the following permits: Dept of Fish and Wildlife HPA, Army Corps of Engineers Section 404, Dept of Ecology Water Quality Certification. H:DOCS:96-527:DMC:ps -2- Higate Lift Station Elimination Environmental Checklist 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. The Higate Lift Station Elimination project entails the installation of approximately 1044 linear feet of 8" diameter gravity sanitary sewer pipe and 3 manholes, the removal of the existing sewage lift station, asphalt patching and revegetation of disturbed areas. 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. The new gravity sewer will extend from a point in NE 201' St that is 5 feet west of the east property line of KC Tax Lot # 334390-3200 (1800 NE 201' St), thence north approximately 612 linear feet through existing utility easements, thence west an offset distance of 7.5 feet south of the north line of KC Tax Lot # 334390-3203 (Lot 2 of REN-SP-60-87) for a distance of approximately 409 linear feet to an existing manhole in Jones Ave NE. The project will be located in the east '/2 of Section 5, T23N, R5E. B. ENVIRONMENTAL ELEMENTS EARTH a. General description of the site (circle one); flat, rolling, hilly, steep slopes, mountainous, other The site is the existing paved roadway, and flat single family residential lots. One of the residential lots is mostly undeveloped field. b. What is the steepest slope on the site (approximate percent slope?) The steepest slope is approximately 1%. C. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any prime farmland. The project site contains Indianola loamy fine sands and Shalcar muck. d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. None. e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. This project will consist of excavation of a trench for purposes of installing an 8 inch sewer main and manholes. The trench will be backfilled with the native soils H:D0CS:96-527:DMC:pS -3- Higate Lift Station Elimination Environmental Checklist where suitable and imported select backfill where not suitable. No change in existing topography will result from this project. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. Minor erosion may result during excavation and backfilling activities. Standard erosion control measures will minimize any impact from the minor erosion. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? There will be no additional pervious area as a result of this project. h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any. - The contractor will be required to use standard erosion control measures including but not limited to fabric in catch basins, hay bales, and silt fencing. 2. AIR a. What types of emissions to the air would result from the proposal (i.e., dust, automobile, odors, industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known. The only emissions that will result from this project will be from construction equipment such as track -hoes, loaders, dump trucks, rollers, etc. b. Are there any off -site sources of emission or odor that may affect your proposal? If so, generally describe. None. C. Proposed measures to reduce or control emissions or other impacts to air, if any: All construction equipment will be required to meet state and federal requirements for emissions. 3. WATER a. Surface Water: 1) Is there any surface water body on or in the immediate vicinity of the site (including year- round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. There is a Category 2 wetland. The City will seek a modification per section "N" of City code 4-3-110 (Wetlands Regulations) to construct within the wetland. 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans. Yes. Installation of sewer main will be within portions of the wetland and it's buffer. H:DOCS:96-527:DMC:ps -4- Higate Lift Station Elimination Environmental Checklist 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. Approximately 638 cubic yards of imported trench backfill material will be used within the wetland and it's buffer. This imported backfill will replace an equal amount of native soil which will be removed from the site during construction. 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. Yes. Temporary diversion of the existing drainage course and trench dewatering will occur during the construction. The original drainage course will be reinstated following installation of the proposed sewer. 5) Does the proposal lie within a 100-year flood plain? If so, note location on the site plan. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. None. b. Ground Water: 1) Will ground water be withdrawn, or will water be discharged to ground water? Give general description, purpose, and approximate quantities if known. The project will require trench dewatering during excavation and pipe installation. Volume will depend on water table at the time of construction. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals...; agricultural; etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. None. C. Water Runoff (including storm water): 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters, If so, describe. None. 2) Could waste material enter ground or surface waters? If so, generally describe. M H:DOCS:96-527: DMC:ps -5- Higate Lift Station Elimination Environmental Checklist d. Proposed measures to reduce or control surface, ground, and runoff, water impacts, if any: None. 4. PLANTS a. Check or circle types of vegetation found on the site: X deciduous tree: alder, maple, aspen, other evergreen tree: fir, cedar, pine, other shrubs X_ grass _X___pasture _ crop or grain Xwet soil plants: cattail, buttercup, bullrush, skunk cabbage, other water plants: water lily, eel grass, milfoil, other other types of vegetation b. What kind and amount of vegetation will be removed or altered? There will be a removal of approximately 12, 5"-8" diameter ialders, 4, 18"-30" diameter alders, and native plants and grasses within the construction zone. The Construction zone will be reseeded with a wetland seed mixture following construction. C. List threatened or endangered species known to be on or near the site. None. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: The Construction zone will be reseeded with a wetland seed mixture following construction. 5. ANIMALS a. Circle any birds and animals which have been observed on or near the site or are known to be on or near the site: (see next page) Unknown. The site is undeveloped and would be anticipated to serve as habitat for a variety of species common to the urban periphery. This may include raptors, songbirds, deer, racoons, and rodents among others. Birds: hawk, heron, eagle, songbirds, other Mammals: deer, bear, elk, beaver, other Fish: bass, salmon, trout, herring, shellfish, other b. List any threatened or endangered species known to be on or near the site. None. H:DOCS:96-527:DMC:ps -6- Higate Lift Station Elimination Environmental Checklist C. Is the site part of a migration route? If so, explain lk"o d. Proposed measures to preserve or enhance wildlife, if any: None required. 6. ENERGY AND NATURAL RESOURCES a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. No energy will be required to operate the gravity sewer main. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. No. C. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: None. 7. ENVIRONMENTAL HEALTH a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste, that could occur as a result of this proposal? If so, describe. None. 1) Describe special emergency services that might be required. None. 2) Proposed measures to reduce or control environmental health hazards, if any: None required. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? None. 2) What types and levels of noise would be created by or associated with the project on a short-term or a long-term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site. H:D0CS:96-527:DMC:ps -7- Higate Lift Station Elimination Environmental Checklist Short term noise impacts will be only those from construction equipment such as track -hoes, loaders, generators, trucks, etc. H:DOCS:96-527:DMC:ps -8- Higate Lift Station Elimination Environmental Checklist 3) Proposed measures to reduce or control noise impacts, if any: Contractor will be required to meet all federal, state, and local noise level requirements. 8. LAND AND SHORELINE USE a. What is the current use of the site and adjacent properties? The existing site is two single family residential lots and small portions of roadway. b. Has the site been used for agriculture? If so, describe. No. C. Describe any structures on the site. None. d. Will any structures be demolished? If so, what? No. e. What is the current zoning classification of the site? Residential 8 DU/AC f. What is the current comprehensive plan designation of the site? Residential single family g. If applicable, what is the current shoreline master program designation of the site? Not applicable. h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. The project site contains a wetland i. Approximately how many people would reside or work in the completed project? None. j. Approximately how many people would the completed project displace? None. k. Proposed measures to avoid or reduce displacement impacts, if any. - None required. H: DOCS:96-527: DMC: ps -9- Higate Lift Station Elimination Environmental Checklist 1. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: None required. 9. HOUSING a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. None. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. None. C. Proposed measures to reduce or control housing impacts, if any: None required. 10. AESTHETICS a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed. None. b. What views in the immediate vicinity would be altered or obstructed? None. C. Proposed measures to reduce or control aesthetic impacts, if any: None required. 11. LIGHT AND GLARE a. What type of light or glare will the proposal produce? What time of day would it mainly occur? None. b. Could light or glare from the finished project be a safety hazard or interfere with views? No. C. What existing off -site sources of light or glare may affect your proposal? None. d. Proposed measures to reduce or control light and glare impacts, if any: None required. H: DOCS:96-527: DMC: ps - 1 0- Higate Lift Station Elimination Environmental Checklist 12. RECREATION a. What designated and informal recreational opportunities are in the immediate vicinity? None. b. Would the proposed project displace any existing recreational uses? If so, describe. No. C. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: None required. 13. HISTORIC AND CULTURAL PRESERVATION a. Are there any places or objects listed on, or proposed for, national state, or local preservation registers known to be on or next to the site? If so, generally describe. None. b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. None. C. Proposed measures to reduce or control impacts, if any: None required. 14. TRANSPORTATION a. Identify public streets and highways serving the site, and describe proposed access to the existing street system. Show on site plans, if any. The project will be constructed within a small portion of NE 20'h St and Jones Ave NE. b. Is site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? No. Approximately 1000 feet east at the intersection of Aberdeen Ave NE and NE 20"' St. C. How many parking spaces would the completed project have? How many would the project eliminate? None. H:D0,CS:96-527:DMC:pS -1 1- Higate Lift Station Elimination Environmental Checklist d. Will the proposal require any new roads or streets, or improvements to existing roads or streets, not including driveways? If so, generally describe (indicate whether public or private? Asphalt patching of NE 201' St. and Jones Ave NE will be required where the new pipeline connects into the existing manholes. e. Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. M f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. None. g. Proposed measures to reduce or control transportation impacts, if any: None. 15. PUBLIC SERVICES a. Would the project result in an increased need for public services (for example: fire protection, police protection, health care, schools, other)? If so, generally describe. None. b. Proposed measures to reduce or control direct impacts on public services, if any. None required. 16. UTILITIES a. Circle utilities currently available at the site: electricity, natural gas, water, refuse service, telephone, sanitary sewer, septic system, other: cable b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. The project consists of the construction of an 8 inch sanitary sewer main that will be owned and operated by the City of Renton. H: DOCS:96-527: DMC:ps -12- Higate Lift Station Elimination Environmental Checklist C. SIGNATURE I, the undersigned, state that to the best of my knowledge the above information is true and complete. It is understood that the lead agency may withdraw any declaration of non -significance that it might issue in reliance upon this checklist should there be any willful misrepresentation or willful lack of full disclosure on my part. Proponent: Name Printed: Vohn D. Hobson Date: _January 31, 2000 H:DOCS:96-527:DMC:ps -13- AGENCY USE�ONLY Agency Reference #:.. " Date Recelvedi Circulated by (Local govt or agency) JOINT AQUATIC RESOURCES PERMIT APPLICATION FORM (JARPA) (for use in Washington State) PLEASE TYPE OR PRINT IN BLACK INK O ❑ 1 am applying for a Fish Habitat Enhancement Project per requirements of RCW 75.20.350. You must submit a copy of this completed JARPA application form, and the (Fish Habitat Enhancement JARPA Addition) to your local Government Planning Department and Washington Department of Fish & Wildlife Area Habitat Biologist on the same day. NOTE: LOCAL GOVERNMENTS — You must submit any comments on these projects to WDFW within 15 working day Based on the instructions provided, I am sending copies of this application to the following: (check all that apply) ❑ Local Government for shoreline: ❑ Substantial Development ❑ Conditional Use ❑ Variance ❑ Exemption ❑ Revision ❑ Floodplain Management ■ Critical Areas Ordinance ■ Washington Department of Fish and Wildlife for HPA (Submit 3 copies to WDFW Region) ■ Washington Department of Ecology for 401 Water Quality Certification Nationwide Permits (to Regional office -Federal Permit Unit) ❑ Washington Department of Natural Resources for Aquatic Resources Use Authorization Notification ■ Corps of Engineers for: a Section 404 ❑ Section 10 permit ❑ Coast Guard for Section 9 Bridge Permit ❑ US Fish & Wildlife Service or National Marine Fisheries Service for Endangered Species Act (ESA) Consultation SECT/ON A - Use for all permits covered by this application. Be sure to ALSO complete Section C (Signature Block) for all permit applications. 1. APPLICANT City of Renton MAILING ADDRESS 1055 S. Grady Way, Renton, WA 98055 WORK PHONE E-MAIL ADDRESS HOME PHONE FAX # 425-430-7279 jhobson@ci.renton.wa.us 425-430-7241 If an agent is acting for the applicant during the permit process, complete #2. 2. AUTHORIZED AGENT John Hobson MAILING ADDRESS 5" Floor, 1055 S. Grady Way, Renton, WA 98055 WORK PHONE E-MAIL ADDRESS HOME PHONE FAX # 425-430-7279 jhobson@ci.renton.wa.us 425-430-7241 3. RELATIONSHIP OF APPLICANT TO PROPERTY: ❑ OWNER ❑ PURCHASER ❑ LESSEE ■ OTHER: City of Renton has Utility Easements across the properties 4. NAME, ADDRESS, AND PHONE NUMBER OF PROPERTY OWNER(S), IF OTHER THAN APPLICANT: Christian R. Denzler: 1800 NE 201" St., Renton, WA 98056 phone 425-235-2850 Jeffrey B. & Charlyn Unbedacht: 2120 Jones Ave. NE, Renton, WA 98056 phone:425-228-0608 Richard & Lauralee Gordley: 2010 Jones Ave NE, Renton, WA 98056 phone:425-254-9814 5. LOCATION (STREET ADDRESS, INCLUDING CITY, COUNTY AND ZIP CODE, WHERE PROPOSED ACTIVITY EXISTS OR WILL OCCUR) This project will take place on the following three single family lots: 1800 NE 201" St., 2120 Jones Ave. NE, 2010 Jones Ave NE, Renton, King County, WA 98056 LOCAL GOVERNMENT WITH JURISDICTION (CITY OR COUNTY) City of Renton WATERBODY TRIBUTARY OF WRIA # Wetland Lake Washington 8 Y. SECTION SECTION TOWNSHIP RANGE GOVERNMENT LOT SHORELINE DESIGNATION SE & NE 5 23N �5E W.M. None LATITUDE & LONGITUDE Lat Long ZONING DESIGNATION IF KNOWN: 47130'37,, 122111'37" Single Family Residential TAX PARCEL NO: DNR STREAM TYPE, IF KNOWN 3343903200;3343903203;3343903563 None 6. DESCRIBE THE CURRENT USE OF THE PROPERTY, AND STRUCTURES EXISTING ON THE PROPERTY. IF ANY PORTION OF THE PROPOSED ACTIVITY IS ALREADY COMPLETED ON THIS PROPERTY, INDICATE MONTH AND YEAR OF COMPLETION. All three properties are residential and each contain one single family residence. IS THE PROPERTY AGRICULTURAL LAND? ❑ YES ■ NO ARE YOU A USDA PROGRAM PARTICIPANT? ❑ YES ■ NO 7a. DESCRIBE THE PROPOSED CONSTRUCTION AND/OR FILL WORK FOR THE PROJECT THAT YOU WANT TO BUILD THAT NEEDS AQUATIC PERMITS: COMPLETE PLANS AND SPECIFICATIONS SHOULD BE PROVIDED FOR ALL WORK WATERWARD OF THE ORDINARY HIGH WATER MARK OR LINE, INCLUDING TYPES OF EQUIPMENT TO BE USED, IF APPLYING FOR A SHORELINE PERMIT, DESCRIBE ALL WORK WITHIN AND BEYOND 200 FEET OF THE ORDINARY HIGH WATER MARK. ATTACH A SEPARATE SHEET IF ADDITIONAL SPACE IS NEEDED. The project proposes to remove an existing sanitary sewer liftstation and install approximately 1044 linear feet of 8" diameter sanitary sewer main line and 3 manholes. Approximately 776 linear feet of the proposed sanitary sewer line will be constructed through a Class-2 wetland. All of the manholes will be placed outside of the wetland and its 50 foot buffer. The method of constructiion will utilize a trackhoe for a standard pipeline dig and bury method. The sewer trench will be approximately 6 feet wide, vary in depth from 4 feet to 15.5 feet. Backfill material for the trench will consist of an imported gravel backfill material to a depth of 2.5 feet above the top of the pipe. The remaining backfill material will reuse the excavated native soils. 6 trench plugs made of control density fill will be installed along the pipe trench to prevent the "piping" of groundwater along the pipe zone. Surface restoration shall consist of hydroseeding the disturbed areas with a wetland vegetation seed mix. 7b. DESCRIBE THE PURPOSE OF THE PROPOSED WORK AND WHY YOU WANT OR NEED TO PERFORM IT AT THE SITE. PLEASE EXPLAIN ANY SPECIFIC NEEDS THAT HAVE INFLUENCED THE DESIGN. The purpose of the project is to eliminate the existing, aging Higate sanitary sewer lift station. Replacement of the lift station with a gravity sanitary sewer line will eliminate sewage overflows that may result from mechanical and/or electrical power failures within the lift station which could contaminate the wetland. The pipeline route was chosen to take advantage of the only possible gravity route to get from the existing lift station to existing downstream gravity sewers. 7c. DESCRIBE THE POTENTIAL IMPACTS TO CHARACTERISTIC USES OF THE WATER BODY, THESE USES MAY INCLUDE FISH AND AQUATIC LIFE, WATER QUALITY, WATER SUPPLY, RECREATION, and AESTHETICS. IDENTIFY PROPOSED ACTIONS TO AVOID, MINIMIZE, AND MITIGATE DETRIMENTAL IMPACTS, AND PROVIDE PROPER PROTECTION OF FISH AND AQUATIC LIFE. ATTACH A SEPARATE SHEET IF ADDITIONAL SPACE IS NEEDED. The project will remove approximattely 638 cubic yards of native soil from the wetland and its 50 foot buffer and replace it with imported gravel backfill material. To minimize impacts, the gravel backfill will be limited to 2.5 feet above the top of the proposed sewer pipe and the remainder of the backfill will utilize the native soils. This will result in 1 foot to 12 feet of native soil over the pipe which will allow wetland plants to resume growth throughout the length of the proposed sewer. 6 trench plugs will be installed along the proposed sewer line to prevent the "piping" of groundwater along the trench backfill. Revegetation of the construction corridor with a wetland seed mixture will ensure that the area will not change aesthetically from the preconstruction condition. PREPARATION OF DRAWINGS: SEE SAMPLE DRAWINGS AND GUIDANCE FOR COMPLETING THE DRAWINGS. ONE SET OFORIGINAL OR GOOD QUALITY REPRODUCIBLE DRAWINGS MUST BE ATTACHED. NOTE: APPLICANTS ARE ENCOURAGED TO SUBMIT PHOTOGRAPHS OF THE PROJECT SITE, BUT THESE DO NOT SUBSTITUTE FOR DRAWINGS. THE CORPS OF ENGINEERS AND COAST GUARD REQUIRE DRAWINGS ON 8.112 X 11 INCH SHEETS. LARGER DRAWINGS MAYBE REQUIRED BY OTHER AGENCIES. 8. WILL THE PROJECT BE CONSTRUCTED IN STAGES? ❑ YES ■ NO PROPOSED STARTING DATE: July 1, 2000 ESTIMATED DURATION OF ACTIVITY: 60 working days 9. CHECK IF ANY STRUCTURES WILL BE PLACED: ❑ WATERWARD OF THE ORDINARY HIGH WATER MARK OR LINE FOR FRESH OR TIDAL WATERS, AND/OR ❑WATERWARD OF MEAN HIGH WATER LINE IN TIDAL WATERS 10. WILL FILL MATERIAL (ROCK, FILL, BULKHEAD, OR OTHER MATERIAL) BE PLACED: ❑ WATERWARD OF THE ORDINARY HIGH WATER MARK OR LINE FOR FRESH WATERS? IF YES, VOLUME (CUBIC YARDS) /AREA (ACRES) ❑ WATERWARD OF THE MEAN HIGHER HIGH WATER FOR TIDAL WATERS? IF YES, VOLUME (CUBIC YARDS) AREA (ACRES) JARPA, Revised 12/98, contact Ecology's Permit Assistance Center for latest version, 360/407-7037 Page 2 of 4 11. WILL MATERIAL BE PLACED IN WETLANDS? ■ YES ❑ NO IF YES: A. IMPACTED AREA IN ACRES: 0.36 Acres B. HAS A DELINEATION BEEN COMPLETED? IF YES, PLEASE SUBMIT WITH APPLICATION. ■ YES ❑ NO C. HAS A WETLAND REPORT BEEN PREPARED? IF YES, PLEASE SUBMIT WITH APPLICATION. ■ YES ❑ NO D. TYPE AND COMPOSITION OF FILL MATERIAL (E.G., SAND, ETC.): Imported 1-1/4 minus Crushed rock backfill E. MATERIAL SOURCE: Approved Washington State Department of Transportation Gravel Pit F. LIST ALL SOIL SERIES (TYPE OF SOIL) LOCATED AT THE PROJECT SITE, & INDICATE IF THEY ARE ON THE COUNTY'S LIST OF HYDRIC SOILS. SOILS INFORMATION CAN BE OBTAINED FROM THE NATURAL RESOURCES CONSERVATION SERVICE (NRCS): Indianola Loamy Fine Sand (NO); Shalcar Muck (YES) 12. WILL PROPOSED ACTIVITY CAUSE FLOODING OR DRAINING OF WETLANDS? ❑ YES ■ NO IF YES, IMPACTED AREA IS ACRES. 13. WILL EXCAVATION OR DREDGING BE REQUIRED IN WATER OR WETLANDS? ■ YES ONO IF YES: A. VOLUME: 638 (CUBIC YARDS) /AREA 0.36 (ACRES) B. COMPOSITION OF MATERIAL TO BE REMOVED: Indianola Loamy Fine Sand and Shalcar Muck C. DISPOSAL SITE FOR EXCAVATED MATERIAL: Disposal of excavated material will be the responsiblitly of the City's contractor in accordance with all Federal, State, County and Local laws. D. METHOD OF DREDGING: Trackhoe 14. HAS THE STATE ENVIRONMENTAL POLICY ACT (SEPA) BEEN COMPLETED? EYES ❑ NO SEPA LEAD AGENCY: City of Renton SEPA DECISION: DNS, MDNS, EIS, ADOPTION, EXEMPTION DECISION DATE (END OF PERIOD): March 7, 2000 SUBMIT A COPY OF YOUR SEPA DECISION LETTER TO WDFW AS REQUIRED FOR A COMPLETE APPLICATION 15. LIST OTHER APPLICATIONS, APPROVALS, OR CERTIFICATIONS FROM OTHER FEDERAL, STATE OR LOCAL AGENCIES FOR ANY STRUCTURES, CONSTRUCTION, DISCHARGES, OR OTHER ACTIVITIES DESCRIBED IN THE APPLICATION (I.E., PRELIMINARY PLAT APPROVAL, HEALTH DISTRICT APPROVAL, BUILDING PERMIT, SEPA REVIEW, FEDERAL ENERGY REGULATORY COMMISSION LICENSE (FERC), FOREST PRACTICES APPLICATION, ETC.) ALSO INDICATE WHETHER WORK HAS BEEN COMPLETED AND INDICATE ALL EXISTING WORK ON DRAWINGS. TYPE OF APPROVAL ISSUING AGENCY IDENTIFICATION DATE OF APPLICATION DATE APPROVED COMPLETED? NO. EPA Review City of Renton LUA-99-088 Following Army Corp. March 7, 2000 Yes City of Renton Construction Permit City of Renton Following all Reviews Water Quality Certification Wash. Dept. of Ecology Pending Hydraulic Project Approval ash. Dept of Fish and IFollowing SEPA jPending 16. HAS ANY AGENCY DENIED APPROVAL FOR THE ACTIVITY DESCRIBED HEREIN OR FOR ANY ACTIVITY DIRECTLY RELATED TO THE ACTIVITY DESCRIBED HEREIN? ❑ YES ■ NO IF YES, EXPLAIN: SECTION B - Use for Shoreline and Corps of Engineers permits only" 17. TOTAL COST OF PROJECT. THIS MEANS THE FAIR MARKET VALUE OF THE PROJECT, INCLUDING MATERIALS, LABOR, MACHINE RENTALS, ETC. $300,000 18. LOCAL GOVERNMENT WITH JURISDICTION: City of Renton 19. FOR CORPS, COAST GUARD, AND DNR PERMITS, PROVIDE NAMES, ADDRESSES, AND TELEPHONE NUMBERS OF ADJOINING PROPERTY OWNERS, LESSEES, ETC.. PLEASE NOTE: SHORELINE MANAGEMENT COMPLIANCE MAY REQUIRE ADDITIONAL NOTICE —CONSULT YOUR LOCAL GOVERNMENT NAME ADDRESS PHONE NUMBER Leona Core 1828 NE 20"h St, Renton, WA 98056 25-226-1593 Robert N. Cave 12518 SE 17'h St, Bellevue, WA 98005 25-644-0121 Keith W., Debbie A. Brownfield 22021 SE 29`h PI., Issaquah, WA 98027 25-392-9374 Lorraine Taylor 2208 Jones Ave NE, Renton, WA 98056 25-226-4577 JARPA, Revised 12/98, contact Ecology's Permit Assistance Center for latest version, 360/407-7037 Page 3 of 4 SECTION C - This section MUST be completed for any permit covered by this application 0. APPLICATION IS HEREBY MADE FOR A PERMIT OR PERMITS TO AUTHORIZE THE ACTIVITIES DESCRIBED HEREIN, I CERTIFY THAT I AM FAMILIAR WITH THE INFORMATION CONTAINED IN THIS APPLICATION, AND THAT TO THE BEST OF MY KNOWLEDGE AND BELIEF, SUCH INFORMATION IS TRUE, COMPLETE, AND CCURATE. I FURTHER CERTIFY THAT I POSSESS THE AUTHORITY TO UNDERTAKE THE PROPOSED ACTIVITIES. I HEREBY GRANT TO THE AGENCIES TO WHICH HIS APPLICATION IS MADE, THE RIGHT TO ENTER THE ABOVE -DESCRIBED LOCATION TO INSPECT THE PROPOSED, IN -PROGRESS OR COMPLETED WORK. I AGREE TO START WORK ONLY AFTER ALL NECESSARY PERMITS HAVE BEEN RECEIVED. SIGNATURE OF APPLICANT OR AUTHORIZED AGENT DATE I HEREBY DESIGNATE TO ACT AS MY AGENT IN MATTERS RELATED TO THIS APPLICATION FOR PERMIT(S). I UNDERSTAND THAT IF A FEDERAL PERMIT IS ISSUED, I MUST SIGN THE PERMIT. SIGNATURE OF APPLICANT DATE SIGNATURE OF LANDOWNER (EXCEPT PUBLIC ENTITY LANDOWNERS, E.G. DNR) DATE THIS APPLICATION MUST BE SIGNED BY THE APPLICANT AND THE AGENT, IF AN AUTHORIZED AGENT IS DESIGNATED. 18 U.S.0 §1001 provides that: Whoever, in any manner within the jurisdiction of any department or agency of the United Slates knowingly falsifies, conceals, or covers up by any trick, scheme, or device a material fact or makes any false, fictitious, or fraudulent statements or representations or makes or uses any false writing or document knowing same to contain any false, fictitious, or fraudulent statement or entry, shall be fined not more than $10,000 or imprisoned not more than 5 years or both. These Agencies are Equal Opportunity and Affirmative Action employers. For special accommodation needs, please contact the appropriate agency in the instructions. DARPA, Revised 12/98, contact Ecology's Permit Assistance Center for latest version, 360/407-7037 Page 4 of 4 Golder Associates Inc. 18300 NE Union Hill Road, Suite 200 Redmond, WA 98052-3333 Telephone (425) 883-0777 Fax (425) 882-5498 SUBSURFACE INVESTIGATION AND GEOTECHNICAL ENGINEERING REPORT FOR THE HIGATE SEWER PROJECT RENTON, WASHINGTON Prepared for: City of Renton Planning/Building/Public Works Department 1055 South Grady Way Renton, Washington 98055 r a" C9� to r Shawn L. McNamara Staff Geological Engineer January 12, 2000 Submitted by: Golder Associates Inc. 18300 NE Union Hill Road, Suite 200 Redmond, Washington 98052 Golder Associates pSDD.<& WAsy� �9 ti EXPMS /O —13 - Richard D. Luarky P.E. Associate Engineer 993-1606.300 0112MIl.doc OFFICES IN AUSTRALIA, CANADA, GERMANY, HUNGARY, ITALY, SWEDEN, UNITED KINGDOM, UNITED STATES January 12, 2000 i 993-1606.300 TABLE OF CONTENTS Page No. 1. INTRODUCTION 1 1.1 Purpose and Scope of Services 1 1.2 Project and Site Description 1 2. GEOTECHNICAL INVESTIGATIONS 3 2.1 Field Investigations 3 2.2 Laboratory Testing 3 3. SUBSURFACE CONDITIONS 4 3.1 General 4 3.2 Geologic Setting 4 3.3 Soil 4 3.4 Groundwater 6 4. ENGINEERING RECOMMENDATIONS 7 4.1 General 7 4.2 Trenched Excavations 7 4.3 Trenchless Excavations 7 4.4 Liquefaction 8 4.5 Trench Backfill Materials 9 4.5.1 Reuse of Construction Spoils 9 4.5.2 Subgrade Preparation 9 4.5.3 Pipe Bedding 9 4.5.4 General Trench Backfill 9 4.6 Post -Construction Settlements and Construction Observation 10 5. CONSTRUCTION CONSIDERATIONS 11 5.1 Temporary Construction Surfaces 11 5.2 Dewatering 11 5.3 Erosion Control 11 5.4 Restoration 12 6. USE OF THIS REPORT 13 LIST OF FIGURES Figure 1 Site Location Map Figure 2 Site and Exploration Plan LIST OF APPENDICES Appendix A Boring Logs Appendix B Laboratory Testing Golder Associates January 12, 2000 1 993-1606.300 1. INTRODUCTION 1.1 Purpose and Scope of Services The City of Renton retained Golder Associates Inc. (Golder) to provide geotechnical consulting services for the proposed sewer line, located in North Renton, east of 405 near the Kennydale Hill area (Figure 1). The purpose of the activities described in this report was to characterize the subsurface geologic conditions, provide general geotechnical conclusions and recommendations and guidelines related to the construction of the sewer line including trenches technology recommendations, and criteria for restoration of the disturbed areas. Golder's geotechnical work activities consisted of subsurface and engineering analyses, performed in accordance with our proposal dated August 5,1999. This report presents the results of the field investigations and provides geotechnical design criteria for the project. 1.2 Project and Site Description We understand that the City of Renton is planning a new 8-inch-diameter sanitary. sewer line in a residential area of North Renton. The new line would allow elimination of an existing pump station and force main. The sewer line would run from an existing MH at Jones Ave NE, due east across a vegetated utility easement and drainage ditch, then due south to NE 20'H Street, and west up 20"' street about 23 feet to an existing MH. The total length of each segment is sununarized below. Segment Leneth (ft,) East-West from Jones Ave. 409 South to NE 20`s St. 612 NE 201' St. 23 TOTAL LENGTH 1,044 The proposed sewer project is located in North Renton, east of 405 near the Kennydale Hill area. The sewer line is divided into three segments as indicated above. East-West From Jones Avenue This section of the sewer alignment runs from station 1+00 to 5+00. From station 1+00 to 2+00 the line travels east underneath Jones Ave NE into an undeveloped lot with minimal grass and weed cover before hitting a series of trees near 2+00. Just beyond the trees at the back of the undeveloped lot the line crosses under a drainage ditch near station 3+00. From station 3+00 to 5+00 the line travels through a sparsely wooded area covered with blackberry bushes. At station 5+00 the line makes a 90-degree turn south. Golder Associates January 12, 2000 2 993-1606.300 There is little to no topographic relief between station 1 +00 and 3+00 except for the sharp drop into the drainage ditch. From station 3+00 to 5+00 there is approximately 10 feet change in elevation as the site slopes up to the east. The soil cover above the sewer line between station 1 +00 and 5+00 varies from approximately 3 to 14 feet respectively. South to NE 20`h Street This section of the alignment runs from station 5+00 to 11+00. From station 5+00 to 6+00 the line travels south under a thick cover of blackberry bushes. Within the blackberry bushes there are remains of 2 old cars and a camper from the residence nearby. From station 6+00 to 7+00 the line continues south beneath the cover of thick blackberry bushes and beneath the remains of an old decaying barn. From station 7+00 to 8+00 the line passes beneath an increasing thickness of blackberry bushes and alongside the residence at 3201 NE 20`s Street. It is also at this point that the soils directly at the surface become increasingly soft and the depth to groundwater is significantly decreasing (wetlands). From station 8+00 to 10+00 the line passes beneath several blackberry bushes rooted within the wetlands. The groundwater table in this area is extremely high and the soil is almost too soft for foot travel. From 10+00 to 11+00 the line passes along side the residence located at 3202 NE 20' Street and into a manhole in the middle of NE 20' Street. The blackberry bushes are not present in this area. There is a row of poplars running parallel to the line up to NE 20`s Street. The site slopes gently downward to the south along the line between stations 5+00 and 11+00 with a topographic relief of approximately 5 feet. The soil cover above the proposed sewer line, between station 5+00 and 11+00, varies from approximately 14 to 4 feet respectively. NE 20s' Street From the manhole in the middle of NE 20' Street the line continues 23 feet to the west underneath NE 20' Street to an existing manhole. NE 20' Street rises steadily to the east toward the existing manhole with a topographic relief of approximately 0.28 feet. The soil cover above the 23-foot run down NE 20' Street is approximately 5.5 feet. Golder Associates January 12, 2000 3 993-1606.300 2. GEOTECHNICAL INVESTIGATIONS 2.1 Field Investigations Field investigations including six test borings (BH-1, BH-2, BH-3, BH-4, BH-5, and BH-6) were conducted on October 4,1999. The exploration locations are shown on Figure 2. Golder's test borings were drilled with a convertible trailer mounted/skid mounted, B-24 drill rig. In order to complete borings within the wetland area the rig was taken off the trailer and pulled to the drilling locations by a dozer. Boretech provided the drill rig and crew, while the dozer was provided by Northwest Excavating, both under subcontract to Golder Associates. Drilling and sampling of soils were performed in accordance with Golder Technical Procedure TP-1.2-5, `Drilling, Sampling, and Logging of Soils". Standard Penetration Tests (SPT) were performed at 5-foot intervals using a standard two-inch diameter split spoon sampler driven by a 140-pound hammer falling a distance of 30 inches, in accordance with ASTM D-1586. A Golder field geologist examined and logged the soil from the borings and recorded the groundwater conditions. The soil samples were classified in accordance with Golder Technical Procedure TP-1.2-6, "Field Identification of Soil", which is summarized on the Soil Description Index in Appendix A. All samples were placed in plastic jars and returned to our Redmond, Washington, laboratory for further classification and testing. At the completion of drilling, all of the borings were backfilled with bentonite chips and cuttings to just below the ground surface. 2.2 Laboratory Testing Geotechnical laboratory index testing was performed on selected samples from the borings. Testing consisted of grain size and moisture. Detailed test results are presented in Appendix B and on the boring logs. Golder Associates January 12, 2000 4 993-1606.300 3. SUBSURFACE CONDITIONS 3.1 General The summary boring logs are presented in Appendix A. Pertinent information including depths, stratigraphy, soil engineering characteristics, and groundwater occurrence were recorded and summarized. The stratigraphic contacts indicated on the summary logs represent the approximate boundaries between soil types. It should be noted that soil conditions are accurate only at the location of drilling and may vary between boreholes. 3.2 Geologic Setting The project is located in the vicinity of the eastern shore of Lake Washington in the Puget Sound region of Washington State. The recent geologic history of Puget Sound was dominated by the influence of glaciers. Nearly the entire Puget lowland is covered by deposits from the Pleistocene Glaciers, the most recent of which receded approximately 13,500 years ago. The most recent glaciation, named the Vashon, deposited soil units consisting of lacustrine silts and clays, advance outwash sand, till and recessional outwash. These deposits, and the weathered soils derived from them, make up nearly all of the near -surface soils on the slopes and higher elevations around Lake Washington. The project area is dominated by two of these glacial deposits, recessional outwash sand and till, with smaller amounts of peat and man -placed fills. 33 Soil Based on the soil conditions encountered in the borings, the stratigraphy is quite variable across the site. In general, the site appears to be underlain by layer of loose to very dense fill or in some locations peat, overlying deposits of loose to compact fine to coarse recessional outwash and very dense glacial till. Soil units encountered in our borings are summarized below: • FILL: Approximately 2.5 feet of fill was encountered in BH-2, 3 feet in BH-3, and 8.0 feet in BH-6. The fill observed in BH-2 and BH-3 was loose silty sand with trace gravel and organics. This fill was most likely imported in the mid 1900s when the site was reported to be used as a horse pasture. The fill observed in BH-6 was a loose to compact silty sand with trace gravel and organics with significant mottling and iron staining. Since BH-6 is located in the shoulder of Jones Avenue, this fill can most likely be attributed to a regrade or filling in of a drainage ditch when the road was put in. • PEAT: Approximately 3 feet of peat was encountered in BH-4 and 3.5 feet in BH-5. In our borings the peat was generally soft, organic, fibrous, clayey silt, with roots and wood fragments. The peat does not seem to be continuous across the alignment. It was found only within the wetland area from station 7+00 to 11 +00. Golder Associates January 12,2000 5 993-1606.300 RECESSIONAL OUTWASH: Recessional outwash is a fluvial deposit laid down by meltwater from a stagnating or retreating glacier. In our borings the recessional outwash was generally a loose to compact, fine to coarse sand with trace to some silt. The recessional outwash was encountered in BH-1 from the surface to 16 feet. The recessional outwash was encountered in BH-2 below the upper fill from 2.5 to 8 feet. The recessional outwash was encountered in BH-3 below the upper fill from 3 feet to the end of the boring at 14 feet. The recessional outwash was encountered in BH-4 below the upper peat from 3 to 11 feet. The recessional outwash was encountered in BH-5 below the upper peat from 3.5 feet to the end of the boring at 14 feet. The recessional outwash was encountered in BH-6 below the upper fill from 8 feet to the end of the boring at 14 feet. Recessional outwash will likely be encountered at the proposed pipeline elevation intermittently from about 1 +00 to 5 +00, and consistently from about 5 +00 to the end of the alignment at 11 +00. We encountered groundwater in d-ds unit above the proposed pipeline elevations in BH-3, BH-4, BH-5, and BH-6. TILL: Till is an unsorted, nonstratified, homogeneous n-dxture of gravel, sand, silt and clay deposited beneath, or adjacent to a glacier. In this region, it is typically dense to very dense due to past consolidation by the weight of thick overlying glacial ice.. In our borings the fill was generally a very dense, silty fine to coarse sand with little to some gravels. Although not encountered in our borings, till commonly contains cobbles and boulders. In addition, fin occasionally contains discontinuous lenses of sand which commonly hold water. These lenses can initially produce moderate groundwater flow when intercepted, but the flow typically decreases rapidly with time as the water is drained from the sand lens. The glacial fill was encountered in BH-1 below the recessional outwash from 16 feet to the end of the boring at 19 feet. The glacial fill was encountered in BH-2 below the recessional outwash from 8 feet to the end of the boring at 14 feet. The glacial fill was encountered in BH-4 below the recessional outwash from 11 feet to the end of the boring at 14 feet. Since these borings were terminated in the fill, the total thickness was unknown but the till appears to be continuous along the alignment. Although the glacial fill was not encountered in BH-3, BH-5, and BH-6, the contact between the recessional outwash and the fill varies in depth across the site indicating that the fill most likely would have been encountered if the borings had been deeper. Glacial fill will likely be encountered at the proposed pipeline elevation intermittently from about station 4+00 to station 5+00. We encountered groundwater in this unit above the proposed pipeline elevations in BH-1 and BH-2. Golder Assoclotes January 12,2000 6 993-1606.300 3.4 Groundwater Groundwater was encountered at the time of drilling (ATD) and in the borings as follows: • Boring BH-1 at a depth of 8 feet below the surface (ATD). • Boring BH-2 at a depth of 3 feet below the surface (ATD). • Boring BH-3 at a depth of 2.5 feet below the surface (ATD). Boring BH4 at a depth of 1 foot below the surface. This area was very wet and soft at the surface. • Boring BH-5 at a depth of 1.5 feet below the surface(ATD). Even though this boring was located adjacent to the road (NE 20' Street), this area was very wet at the surface. 0 Boring BH-6 at a depth of 4.5 feet below the surface (ATD). The water table encountered was interpreted to be perched on top of the relatively impermeable glacial fill that was found in our borings or inferred below the recessional sand layer. Since the water levels were measured during drilling, the actual water table may be slightly different, and could vary seasonally. In particular, the water table may be closer to the ground surface during the winter and early spring. Between station 7+00 to 11 +00, the water table is likely above the existing ground surface during the winter and early spring. Golder Associates SG4]DIOOSgV JOPIOS ji gu pnxt p pannbai aq Xlar4q p1nom spn-Lu 2uT p pup sampaawd uoT SUOZ) urau jupadS -alis sn p ju luu!2.xuLu aq ol sjuaddv 2uT .Iauurqojonu'ijaA'n molluqs Xlx!pj p 1PIM pau!qLuoz) Ispuus jruoissaow alp jo am4ru asool pup alqu4niumpunoB q2r q aip ol anCl -Luva4s aip ippauaqiamas aip 2uT s! 2uWRf iauq .Uujsu�.ioj poxpatu axpapa-Isoz) Isotu aip Alalq laalS -sild 2uqe.Tado pUR 2UR?Pf DIP JOJ'4PrP!A alp U! palrdpiguu aq pinoqs 2ur u .qa axt ump jaluaa aoueqnqs!p lqz)l!p a�mmujp/tuu.-%qs aip ol uo,.4drusip 2uiznunrnu jo suual ui sa2inupApu pu4s!piajjo spoipain ssalqz)ua4 q2noipIV -2uT Iauur400ltu pup 2uRaul jauq-laals ip!m saioq juluozuoil apnl:)ui Auwiamas w-p jo uor uuulstr! xoj spolpain lauq jamas Pasodcud aip jo ams aip uo pasuq -pasn aq Autu spoxpaw alqLq!ns isatu alp ssal,qz)ua4 log+Z uo,4uls jvLuua4s Umus aip jo az)ueqni4s!p aznuTunu ol Iap-lo ul SUOT .IrAr:)Xa ggalq;)UaJJL C-P -:podai sn p jo Z-g uor U2 Up paSu!paupluoaa-ILILlual�0 IsaP2 alMaCl -UO-qUAV-JXa fip L, u-mqujum ol pup -qz)uaj4 aip jo -Luo44oq aip jo aAua'q 12ur .q2nols numapls loxtuoz) olialL,,mpunoj2 jo 2upalemap -ioi alq!suodsai aq pjnoqsiopuxjuoz) aql .PaltldP'4uu aq pinois qjumaps il;)uajq alp jo 2rq.aAU.I pup juaxqiaAO,2u!qnols lajqLjxajwA il2i -n(j -xoq .q r ipim pauTqLuoz) Ispuus ILuoissaz)ai pudium ol asool jo az)uasaid aip ol a aip puTilaq Alale!paurua! molloj p1noils 2uqMz)uq pup liom aip alaldtuoo ol fuessaaau urnurpl,!w aip ol palnuT a4 alp JO PPaljR U01 .4LIAROXa allL -liodai .1 aq p1noils xoq ilz)u aip jo uor --pni4suoz) aip u! pauT I'M .MLIJ4 UOr su z):P PTLq 0 oddns ol paunb aml pas uol pno SL aq Utm az)p4ms 2uRiom L, lwp�ms punoA aip jo an4vu 4jos aip ol ana 'SUOTIRALMa xoq-ilz)ua.q pappuqs 2uisn pallulsui aq uua auq jamas axgua aip iuLp uoundomo sl 11 'pailst .1d,Luoz)z)L, st spurs luuolssaz)aj paluml4us aip jo 2upairmap fueioduial PaPIA0.1d 9UOI .jFAP3Xa Paq:)UaJJL Z-V -z)Ujuj4 uor . pni4suco lioddns 01 paxpbaj aq HTm az)pjms guppom v,suo,.4!puoz) punOJ2:gos aip ol anp losty -auq zamas aip jo uor m 2upalumap fainoduiaj, -sp /a YA . pm4suoa 2uLmp paimbai aq W os 74os sool ip pair!quaoo alqLq jalempunoB 42T .q L, ol uynja� alls sn p le sansst juDm . qz)aloa2 u-tum aili, uorlLjs Inoqu le palmol sl uiea4s/q:)j!p a2umvip Ilums e se IOL+Z ol gC+Z suor ge4s uaamlaq auqlatAaS alp WURAPP 01 pasodo.Td st Bojouqaaj ssaMZ)UaJ4 IlaPjOq 01 PaPjAoid suuld fauunuT -Uq IL aSUaP-fUaA . .1aid aip uo paseq . puO -04-asuap jo spuus ilsetAlno lumisswai puduioa ol asool jaipp ut paimol aq ol papadxa s! pasodoid SE UOI .41BAMXa -qz)uaxt jamas aip jo uiol4oq ailL -ju!odpuu4s lu:)T.uqz)aloa2 P uio�j alq!suaj weaddu pafold pasodoid atp Isuo,41eioldxa oz),p4msqns xno uo paseq lu.jauag T.-V SNOIIV(lNaWWO3all ONIUaaNIONa *V 00'0*9091-C66 z OOOZ IZI AiunuLf January 12,2000 8 993-1606.300 microtunneling is attempted. The only advantage of trenchless installation of the sewer line is minimizing the disturbance to the wetlands present at the site. However, in the proposed alignment, manholes are spaced at approximately 400 feet, and installation would require disturbance to the wetlands for installation of the manholes. The manholes would provide logical locations for operating pits for either jacking or microtunneling. Based on our explorations completed for this study, glacial fill will likely be encountered at the proposed pipeline elevation intermittently from about station 4 +00 to station 5+00. Encountering fill could negatively impact tunneling or jacking in two ways: 1. Boulders that may be present in the till could provide construction problems, ranging from slowed production to borehole obstruction. 2. The change in hardness at a geologic contact (loose, saturated recessional sands/very dense glacial fill) may tend to deflect the auger or tunneling machine from its intended alignment. If trenchless excavation methods are used, bids should include contingencies for encountering boulders in the glacial fill. We would expect groundwater to be encountered above the pipe invert elevation over the entire alignment. Within the saturated recessional sand, some ground loss may occur if good n-dcrotunneling construction practices are not followed or if liners are not jacked in advance or concurrently with the excavation face. The contractor should be responsible for control of settlement and in particular for ensuring that any settlements that occur do not affect adjacent utilities. Some form of drop shaft will need to be excavated in order to construct the manholes and to provide a staging area for n-dcrotunneling equipment. At locations where a staging area for tunneling is required, the likely minimum diameter of the drop shaft will probably be about 12 feet. The contractor should anticipate that dewatering would be required over the majority of the alignment. We expect that active dewatering measures (e.g., wellpoints) may be necessary to dewater the excavation. 4.4 Liquefaction Loose to compact granular soils below the water table can liquefy during a seismic event, causing damage to utilities buried in such soils due to lateral spreading and ground settlement. The pipe and base of the manholes will be below the permanent water table over much of the alignment. The borings indicate that loose to compact sands will be present below the proposed pipe invert, except around stations 3+00 to 4+00, where our boring at station 3+50 encountered glacial till slightly above the pipe invert. During the design earthquake event (7.5 magnitude), the saturated recessional sands are considered susceptible to liquefaction. The consequences of liquefaction are that the pipeline may displace or float during liquefaction. Liquefaction can be mitigated. However, the associated cost is typically greater than replacement for a sewer line of this size. Golder Associates January 12,2000 9 993-1606.300 4.5 Trench Backfill Materials 4.5.1 Reuse of Construction Spoils In general, the outwash sands excavation spoils can be reused as trench backfill. However, materials with high silt contents (i.e., fills and the fill materials), typically can only be used for trench backfill during the drier summer month when the moisture can be controlled. The organic materials (i.e., peats), should not be used for trench backfill. 4.5.2 Subgrade Preparation In general, provided ffiat the site is properly dewatered, we would expect that the undisturbed native site soils will provide adequate subgrade support. Loosened or disturbed material should be removed from the trench bottom prior to the placement of the pipe bedding material. Areas which contain loose or soft materials at the pipe or manhole invert should be over -excavated and replaced with crushed rock or other suitable fill material. 4.5.3 Pipe Bedding Pipe bedding material should be placed beneath the pipe and within the pipe zone in accordance with "Pipe Bedding for Sanitary Sewers" as adopted by the City of Renton. Bedding above and below the pipe should be hand tamped with several passes of a vibrating plate compactor. Bedding material beneath the haunch should be hand tamped by stabbing the bedding with a shovel to provide adequate pipe support. 4.5.4 General Trench Badkfill The general trench backfill placed above the pipe zone should consist of material free of organdc debris and other deleterious material. The general trench backfill material should be placed in loose lifts not greater than eight inches thick and compacted to at least 95% of the maximum modified Proctor dry density (ASTM D 1557) for the upper three feet below pavement areas. The remainder of the trench backfill should be compacted to 90% of the maximum modified Proctor dry density (ASTM D 1557). Heavy compaction equipment should not be used until at least two feet of material has been placed above the crown of the pipe. Backfill materials within two feet of the crown should be compacted with fight, hand -operated compaction equipment. Alternatively controlled -density fill (CDF) could be used in place of granular backfill. Golder Associates January 12,2000 10 993-1606.300 4.6 Post -Construction Settlements and Construction Observation For the proposed pipeline alignment and invert elevations, we estimate that the total post -construction settlements after the pipe placement will be negligible provided that construction is adequately monitored and the subgrade and backfil.1 placement recommendations in this report are followed. Therefore, we recommend full time monitoring of the bacl<.fill placement operations in order to verify proper subgrade preparation and compaction of backfill. Golder Associates January 12,2000 11 993-1606.300 5. CONSTRUCTION CONSIDERATIONS 5.1 Temporary Construction Surfaces Over much of the alignment and particularly between stations 7+00 to 11+00, the ground surface is soft and wet, and will not support construction equipment. Therefore, we recommend that a temporary working surface be provided to allow for construction access. Within the wetland areas, this surface should be removed to allow for restoration. Temporary working surfaces consisting of wood chips or wood spans (bark that is removed from logs prior to milling) can be used to provide the temporary working surface. Between stations 7+00 to 11 +00, a reinforcing geogrid or geotextile may be required between the temporary working surface and the existing ground surface. The reinforcement should be laid in two strips, one on each side of the proposed trench excavation. Alternatively, steel sheets laid on the ground in the wetland areas could also provide a working surface for the construction equipment. Based on recent experience with PSE (Puget Sound Energy), the use of steel sheets as a working surface over soft ground were found to be more effective than other methods. 5.2 Dewatering The contractor should be responsible for dewatering of groundwater to control heave and maintain a dry excavation. The dewatering system should be sufficient to remove groundwater below the bottom of the trench, so that the subgrade is not disturbed and so that it remains firm under the feet of the workmen. We expect that active dewatering may be necessary over the majority of the alignment. An active dewatering system, such as a series of wells or well points appear feasible to dewater the site. We recommend that the groundwater table be lowered to at least 3 feet below the bottom of the trench. Detailed dewatering design criteria was beyond the scope of this report; however, typical hydraulic conductivities of recessional sands in the Puget Sound Region range from 1 x 10' cn-Vs to I x 10-4cn-Vs. Based on the grain size analyses performed on the recessional sands (the results are contained in Appendix B), we recommend that a hydraulic conductivity on the order of 1 x 10' cn-Vs be used for preliminary design of the dewatering system and estimation of pumping rates. We recommend that the contract documents be structured such that design of the dewatering system is the Contractors responsibility. If the water pumped from the dewatering system is discharged into a natural drainage course, a permit will likely be required by the WSDOE. Alternatively, the water could be discharged into the storm or sewer system. 5.3 Erosion Control Prior to and during construction, we recommend that an erosion and sediment control system be installed and maintained to prevent transport of sediment into the wetlands and drainage ditches. To minimize sediment and site disturbance, we recommend that the construction be performed during the dry season. We recommend that the erosion Golder Associates January 12,2000 12 993-1606.300 and sediment control system be designed in accordance with Appendix D — Erosion and Sediment Control Standards, King County, Washington, Surface Water Design Manual, or other appropriate reference. 5.4 Restoration Construction of the pipeline and manhole will involve removal of vegetation and placement of temporary/permanent fills. Within the wetland areas and wetland buffers, we anticipate that temporary construction surfaces will be required to allow for support of construction traffic. Within the wetland areas, we anticipate that removal of the temporary construction surface will be required and that the disturbed areas are replanted. We recommend that the King County Surface Water Design Manual be consulted to determine the seed n-dx and plants that are appropriate for replanting the wetlands that have been disturbed. Specifically, Table 6.3.1.D (page 6-45) list plants tolerant of frequent saturated soil conditions or standing water. If possible, within the wetland areas, we recommend that the ground surface be restored to the preconstruction grades. This is to insure that the surface water and groundwater flow regime will be the same as the preconstruction conditions. Golder Associates January 12,2000 13 993-1606.300 6. USE OF THIS REPORT This report has been prepared exclusively for the use of The City of Renton and their consultants for specific application to this project. This report pertains only to the project design plans that were provided to Golder, showing the proposed location of the pipeline alignment and manhole locations. We recommend that Golder be allowed to review the final project documents to evaluate conformance and implementation of our geotechnical recommendations. Additional explorations and site evaluation may be needed if significant design changes are made. Our exploration was performed in general accordance with locally accepted geotechnical engineering practice to provide information for the area explored. There are possible variations in the subsurface conditions between the exploration areas and in the groundwater conditions with time. We recon-unend that a contingency for unanticipated conditions be included in the construction schedule and budget. Further we recommend our firm be retained to provide consulting services during construction to confirm the conditions indicated by the explorations and/or provide corrective recommendations adapted to the conditions revealed during the work - Golder Associcites FIGURES Golder Associates SID 6T H 13 a_ SE 68T 0. C. Ew jE S Lu a. 9) Z Lu jF 7 S 71 w �,F� -C 72N m rd m a 44 m -04 SE 76 m M > m Ch - ------ -- SE 7aTH n U) CA m M r iWC reek �F vc �4A� _7 rn m m m ISE 3 m T In P;� yn"g a 38TH NY > < w z 3 0* CD -1- A.. m - u Cv Z 36TV % 8S 434 m 8i 0 A: Jai ui Cn 25 m 32NO A� m w *,ggz� �4, 28T N N 2 28TH z np- ui uj L-u uj WN7 ma Cm z X El 24-� 9 pg* L I �,-jj j-1j 3: -1(1, 7C N -�P> :1 ui Z 'X -R- rgl-� m w z ca N I ,0 z 7 JE 0 Q E N z E NE w N OTH w w 0 N 1E M Z liff If E z rItj STH w m 7 SE 120TI 121ST E 6 Rento Muni FIGURE VICINITY MAP CITY OF RENTONMIGHGATE SEWERIWA IOJECT NO. 993 1606.300 DRAWING NO. 85360 DATE 12/2Z'99 DRAWN BY TK Golder Associates V� t J-1. —46 hl, % W-6 N,— IRK viz R 2 X W C� -T 3N '3Aq S3NOP ::BH-1 LDT W WT -0 �D HO= r i> (—L) Z W-1 lo 1: B H 3(' -------------- -------- J. -BH-4 5 i;6 ---------- --�F - !Z�s E ------------------- \ ------- (F-F - ----------------- - L ---------- ...................... ......... ---------------------------- ......... ------------ ---4 -------------------- -- ------- E R R I Es ------ ------- CK D-M t� f-k %MT "T LOT s— P-Dw MTL-co y 110.q, T" WT 320D mw paw BH;-2 'v LEGEND BH-3 �e Borehole location and designation 0 120 FEET .m 5i FIGURE 2 SITE AND EXPLORATION PLAN CITY OF RENTONIHIGHGATE SEWERMA PROJECT NO. 993 1606.300 DRAWING NO. 91054 DATE 12/2n9 DRAWN BY EA Golder Associates APPENDIX A BOREHOLELOGS Golder Associates Unified Soil Classification System Soil Closs;ficotion Criteria for Assigning Group Symbols and Names Generalized Group -Descriptions COARSE —GRAINED SOILS more than 50% GRAVELS More than 50% of CLEAN GRAVELS Less than 5% fines GW Well —graded Grovels GP Poorly —graded grovels retoine 0� coor e fraction No. 26d sieve retais.cl on No. 4 Sieve GRAVELS WITH FINES More than 12% fines GM Gravel and Silt Mixtures — GC Gravel and Cloy Mixtures SANDS CLEAN SANDS SW Weil—groded Sands 50% or mom of Less than 5% fines SP Poort,—gl.ded Send. coarse fraction posses No. 4 Sieve SANDS WITH FINES SM Sand and Silt Mixtures More than 12% fines — SC Send and Cloy Mixtures FINE—GRAJNED SOILS 50% or more posses the No. 200 sieve SILTS AND CLAYS Liquid limit less than 50 INORGANIC CL Lo—plasticity Clays ML Non—plostic and Lo— Plasticity Silts Non—plostic and Lo— ORGANIC OL Plasticity Organic Clays Non —plastic and Lo­ Plasticity Organic Silts SILTS AND CLAYS Liquid limit INORGANIC CH High —Plasticity Clays MH High—picisticity Silts greater than 50 High—pla3ticity ORGANIC OH OH Organic Clays High —Plasticity Organic Sifts HIGHLY ORGANIC SOILS Primarily organic matter. dark in color. and I organic odor PT . Peat Relative Density or Consistency Utilizing Standard Penetration Test Values Cohesionless Soils (a) Cohesive Soils (b) (c) Relative (c) Undroined (d) Density N. blows/ft(c) Den Consistency N, blows/ft. Shear Strength .�ty (7 (Psf) Very loose 0 to 4 0 — 15 Very soft 0 to 2 <250 Loose 4 to 10 15 — 35 Soft 2 to 4 250-500 Compact 10 to 30 35 — 65 Fim 4 to 6 500-1000 Dense 30 to 50 65 — 85 Stiff a to 15 1000-2000 very Dense over 50 >85 Very Stiff 15 to 30 2000-4000 1 Hand over 30 >4000 (a) Soils consisting of gravel. send, and silt. either separately or in combination. possessing no Characteristics of plasticity. and exhibiting drained behavior. (b) Soils possessing the characteristics of plasticity. and exhibiting undrained behavior. (c) Refer to text of ASTM D 1586-84 for a definition of N; in normally consolidated cohesionless soils Relative Density terms are based on N values corrected for overburden pressures. (d) Undroined shear strength - 1/2 unconfined compression strength. Descriptive Terminology Denoting Component Proportions Descriptive Terms Range of Proportion Trace 0-5% Little (a) 5-12% Some or Adjective And 12-30% 30-50% (a) Use Gravelly. Sandy or Silty as appropriate. Component Definitions by Gradation Component I Size Range Boulders Above 12 in. Cobbles 3 in. to 12 in. Gravel 3 in. to No. 4 (4.76mm) Coarse grovel 3 in. to 3/4 in. Fine grove: 3/4 in. to No. 4 (4.76mm) Send No. 4 (4.76mm) to No. 200 (0.074rnm) Coorlie send No. 4 (4.76mm) to No. 10 (2.Omm) Medium send No. 10 (2.0mm) to No. 40 (0.42mm) Fine sand No. 40 (0.42mm) to No. 200 (0.074MM) Silt and Cloy I Smaller than No. 200 (0.074mM) Samples SS SPT Sampler [2.0" OD) HD Heavy Duty Split Spoon SH Shelby Tube P Pitcher Sampler a Bulk C Cored Unless other�ise noted. drive so.rnpies advanced ith 140 lb. hommer witn 30 in. drop. Laboratory Tests Test Designation Moisture (1) Density D Groin Size G Hydrometer H Atterberg Limits (1) Consolidation C Unconfined U UU Triax Uu CU Triox CU CD Triax CD I Pe meability P I (1) Moisture and Atterbefg Limits plotted on log. Silt and Clay Descriptions Description Typical Unified Designation silt ML (non —plastic) Clayey Silt CL—ML Qo� plasticity) Silty Clay CL Clay CH Plastic Silt MH Organic Soils I OL OH. Pt (a Golder Associates Figure SOIL CLASSIFICATION/LEGEND PROJECT Renton/Highgate RECORD OF BOREHOLE BH-1 SHEET 1 OF Sewer/WA DATUM: MSL PROJECT NUMBER: 993 1606 BORING LOCATION: Renton, Washington BORING DATE: 10/4/99 0 SOILPROFILE SAMPLES PENETRATION RESISTANCE BLOWS/FT PIEZOMETER W Lu t,0 ED 90 AD GRAPHIC w 2 0 ELEV cr. BLOWS / 6 IN. CD z DESCRIPTION U) Y (I < Lu M N 0 WATER CONTENTPERCENT WATER - W M 0 U) a: 0 DEPTH 2 D o- 140 lb. hammer W Wpt OW W1 LEVEL 0 z 30 inch drop 256.0 Forest dulf . . . . . . . . .. .. 0 Compact, light brown, nonstratified, fine to coarse SAND. trace angular gravel, some silt, damp (RECESSIONAL OUTWASH) 2.5 SM I ss 9-9-9 18 111/18 04.4 G 4.0 5 - -- - 16.3 7.5 - - - - - - - - - - Compact. olive brown, nonstratified, silty, fine to SM 2 ss 5-6-7 13 18118 0 ATD coarse SAND, trace gravel, iron stained, 9.0 interbedded clayey silt lenses, moist to wet U) (RECESSIONAL OUTWASH) 10 18.4 12-5 sm 3 SS 6-7-11 18 18/18 0 0 14.0 15 17.5 SM 4 SS 35-40-51316 >50 8.70 Boring Terminated @ 19.0 It bgs 19.0 20 —25 —30 DRILL RIG: B-24 LOGGED:SLM DRILLING CONTRACTOR: Boretec CHECKED: DPF DRILLER: Rich DATE: 12/14/99 PROJECT Renton/Highgate RECORD OF BOREHOLE BH-2 SHEET 1 OF Sewer/WA DATUM: MSL PROJECT NUMBER: 993 1606 BORING LOCATION: Renton, Washington BORING DATE: 10/4/99 0 SOILPROFILE SAMPLES PENETRATION RESISTANCE BLOWS/Fr. PIEZOMETER W W 1 10 90 go AO 40 GRAPHIC W LL 2 0 ELEV. a: BLOWS / 6 IN. X: , 0 z DESCRIPTION U) Q. W N M WATER CONTENTPERCENT WATER CL Lu cc 0 < 0 cc U) DEPTH EL 140 lb. hammer D Lu Wpt AN ---t W1 LEVEL D 0 z 30 inch drop cc 248.0 0 Forest muff — — — — — — — — -- — Loose, dark brown. nonstralified, silty SAND, SM trace gravel, organics present as roots and wood, moist (FILL) Loose olive brown, laminated, silty fine SAND, SM 2.5 iron stained. wet (RECESSIONAL OUTWASH) I ss 3 -3-4 7 la/18 29.30 —V— ATD 4.0 5 < - - - - - - - - - - 7.5 15.0 Dense, olive gray, nonstratified, silty line to coarse SM 2 SS 20-26-15 41 18/181 0 SAND. little subrounded gravels, occasional iron staining, moist to wet (TILL) 9.0 10 12.5 13.5 SM 3 ss 20-23-18 41 0 Boring Terminated @ 14.0 It bgs 14.0 15 -20 -25 -30 1 DRILL RIG: B-24 LOGGED: SLM DRILLING CONTRACTOR: Boretac CHECKED: DPF Golder (9-XsSociatm DRILLER: Rich DATE: 12/17/99 PROJECT Renton/Highgate RECORD OF BOREHOLE BH-3 SHEET 1 OF Sewer/WA DATUM: MSL PROJECT NUMBER: 993 1606 BORING LOCATION: Renton, Washington BORING DATE: 10/4/99 0 0 SOILPROFILE SAMPLES PENETRATION RESISTANCE BLOWSIFT. 1PIEZOMETER W W 10 �O ED APHIC W 0 ELEV ELEV cc BLOWS / 6 IN. =' 0 z DESCRIPTION W W N WATER CONTENTPERCENT WATER EL W Cc 0 a: 0 D E P, TH DEPTH D (L 140 lb. hammer W pt W W1 LEVEL 0 Co 0 z 30 inch drop Cc 25 251.0 0 Forest q.—H — — — — — — — — -- — Loose, dark brown, nonstratified, silty SAND, organics present as roots and wood, moist to wet (FILL) 2.5 — — — — — — — — — — — Compact. reddish olive brown, nonstratified. fine SM ATD to coarse SAND, little silt, wet (RECESSIONAL ss 1-4-4 8 2*/18 18.80 OUTWASH) 4.0 5 U) coarsening with depth 7.5 SW W.. 2 ss 8-9-11 18 18/18 5 20.4 G 9.0 10 12.5 SM 3 ss 15-16-22 38 lat18 012.5 Boring Terminated 14.0 it bgs 14.0 15 —20 25 30 DRILL RIG: B-24 LOGGED: SLM DRILLING CONTRACTOR: Boretec CHECKED: DPF gft' DRILLER: Rich DATE: 12/17/99 A&SOciates PROJECT Renton/Highgate RECORD OF BOREHOLE BH-4 SHEET 1 OF Sewer/WA DATUM: MSL PROJECT NUMBER: 993 1606 BORING LOCATION: Renton, Washington BORING DATE: 10/4/99 0 0 3: SOILPROFILE SAMPLES PENETRATION RESISTANCE PIEZOMETER w BLOWs/Fr 10 90 �O GRAPHIC w M E El L ELEV. Cl BLOWS / 6 IN. 0 z DESCRIPTION u) (L w N w WATER CONTENTPERCENT WATER CL W cc 0 < Cc 0 DEPTH DEPTH a- 140 lb. hammer D w. W p t W1 LEVEL co z 30 inch drop M. 250.0 0 Forest duff — — — — -- — — — — — — — — Soft, clark brown, nonstratkilied, organic, fibrous PT —V— PEAT, wood fragments, moist to wet (PEAT) ATD 2.5 Loose, olive brown, nonstratified, fine to coarse SW 1 ss 4-3-3 6 18/18 0 023.9 132.2 >4 SAND, trace silt, little organics, wet (RECESSIONAL OUTWASH) 4.0 5 U) 7.5 I 19.5 C SW 2 ss 5-8-11 19 18/18 1 9.0 10 — — — — — — — — — — — -- Very dense, olive brown, nonstratifled, silty — SAND, little gravel, moist (TILL) 12.5 S M 3 SS 50/4' 011.4 Boring Terminated @ 14.0 ft bgs 14.0 15 —20 —25 30 DRILL RIG: B-24 LOGGED: SLM DRILLING CONTRACTOR: Boretec, CHECKED: DPF DRILLER: Rich DATE: 12/17/99 AssociaWs PROJECT Renton/Highgate RECORD OF BOREHOLE BH-5 SHEET 1 OF 1 Sewer/WA DATUM: MSL PROJECT NUMBER: 993 1606 BORING LOCATION: Renton, Washington BORING DATE: 10/4/99 0 SOILPROFILE SAMPLES PENETRATION RESISTANCE BLOWsiFr. N PIEZOMETER W W to 90 10 AO E) GRAPHIC W LL 2 Li ELEV. CC BLOWS / 6 IN. M F- 0 z DESCRIPTION cn x CL < — Lu M N 0 WATER C07NTPERCENT WATER 0- W Cr 0 Q) U) CC 0 DEPTH Z) o- 140 lb. hammer Ld Wp. WI LEVEL 0 co 0 30 inch drop M 250.0_ Soft, dark brown, nonstratdied, organic, fibrous 0 PEAT, little sand and wood fragments, moist to wet (PEAT) ATD V4.'O 2.5 PT 1 ss 1-4-5 49.50 — — — — — — — — — — — -- Loose, olive brown. nonstratified, organic — SIN 4.0 CLAYEY S ILT, little sand, organics present as roots and wood, wet (PEAT/ORGANIC SILT) 'Z 5 U) — — — — — — — — — — — -- Compact. light brownish gray, nonstratified, sitty — x fine to coarse SAND, wet (RECESSIONAL OUTWASH) v: 7.5 sm 2 SS 8-12-14 26 1at18 16.601 9.0 10 12.5 2 SM 3 SS 8-12-17 29 20.91 G Boring Terminated 14.0 ft bgs 14.0 15 20 25 30 DRILLRIG: B-24 LOGGED: SLM DRILUNG CONTRACTOR: Boretec, CHECKED: DPIF Golder (#A�&sociaws DRILLER: Rich DATE: 12117/99 PROJECT Renton/Highgate RECORD OF BOREHOLE BH-6 SHEET 1 OF Sewer/WA DATUM: MSL PROJECT NUMBER: 993 1606 BORING LOCATION: Renton, Washington BORING DATE: 10/4/99 0 SOILPROFILE SAMPLES PENETRATION RESISTANCE BLOWSIFT PIEZOMETER Lu W I f,0 �O 2io V ED GRAPHIC LU LL 0 ELEV Cr BLOWS / 6 IN. M 0 z ± — DESCRIPTION U) 0- < w N i E3 Lu WATER CONTENTPERCENT WATER 0- Lu M 0 0 U) a: 0 DEPTH 0- 140 lb. hammer D w WPI W1 LEVEL 0 co z Cc 30 inch drop 257.0 0 Loose, olive gray, nonstratified, mottled, fine to medium SAND, little silt, trace gravel, iron staining, moist to wet (FILL) 2.5 SM 1 ss 4-3-3 6 18/181 0 19.3 c 4.0 ATD 5 — — — — — — — — — — — --- ----- 7.5 19.8 c 25.2 Compact, olive gray, nonstratified, fine to medium SM 2 ss 13 18/18 0 0 SAND, some silt, wet (RECESSIONAL OUTWASH) 9.0 10 interbeds of laminated gray silt 12.5 SM 3 ss 8-6-4 10 18118 o21.4 G Boring Terminated 14.0 It bgs 14.0 20 25 30 DRILL RIG: B-24 LOGGED: SLM ( WOM"! DRILLING CONTRACTOR: BO(etec CHECKED: DPF C ioldex DRILLER: Rich DATE: 12117/99 Assod. APPENDIX B LABORATORY TEST RESULTS Golder Associates GOLDER ASSOCIATES, INC. -- REDMOND, WA MOISTURE CONTENT CALCULATION SHEET ASTIVI D-2216 PROJECT: CITY OF RENTON / HIGHGATE SEWER / WA PROJ. NO: 993-1606.200 DATE: 10/28/99 TECH: TCM REVIEW: TCM BORING SAMPLE DEPTH WET WT. (g) DRY WT. (g) TARE WT. TARE (g) NO- I MOISTUREJ N BH-1 S-1 2.5 395.40 382.40 85.20 4.4 BH-1 S-2 7.5 451.70 401.00 90.20 16.3 BH-1 S-3 12.5 453.70 395.20 77.80 18.4 BH-1 S-4 17.5 457.20 427.70 88.30 8.7 BH-2 S-1 2.5 369.80 306.40 89.70 29.3 BH-2 S-2 7.5 565.00 503.00 89.90 15.0 BH-2 S-3 12.5 470.30 423.20 73.40 13.5 BH-3 S-2 7.5 593.90 506.60 78.90 20.4 BH-3 S-3 12.5 515.10 467.70 89.40 12.5 BH-4 S-1 up 2.5 190.20 137.60 97.80 132.2 BH-4 S-1 low 2.5 384.20 327.60 90.90 23.9 BH-4 S-2 7.5 516.30 446.70 90.50 19.5 BH-4 S-3 12.5 238.90 225.50 108.30 11.4 BH-5 S-1 2.5 329.30 249.10 87.10 49.5 BH-5 S-2 7.5 583.90 516.00 107.00 16.6 BH-5 S-3 12.5 523.90 449.10 90.70 20.9 BH-6 S-1 2.5 466.80 406.00 91.20 19.3 BH-6 S-2 up 7.5 381.00 332.90 89.90 19.8 BH-6 S-2 low 7.5 480.50 405.30 107.00 25.2 BH-6 S-3 12.5 468.80 405.10 107.00 21.4 IBH-3 S-1 2.5. 181.40 169.70 107.60 18.8 GOLDER ASSOCIATES, INC. -- REDMOND, WA GRAIN SIZE ANALYSIS -- WASH SIEVE ASTM D1 140 / D422 PROJECT: CITY OF RENTON / HIGHGATE SEWER / WA PROJECT NO: 993-1606.200 DATE: ll/l/99 TECH: TCM REVIEWER: TCM BOREHOLE BH-1 SAMPLE S-1 DEPTH (ft) 2.5-4 Description: Brownish Gray, F-M SAND, some silt, trace fine gravel USCS: NATURAL MOISTURE C Gravel 0.0%1 Tare Number F Gravel 1.8%1 Wet Weight + Tare (g) 583.00 C Sand 8.1%1 Dry Weight + Tare (g) 570.00 M Sand 44.4%1 Tare Weight (g) 272.80 F Sand 3 2. 5 0/j. Water Content (%) 4.4%] Fines Sieve Retained Passing (g) CUM. tare 272.80 311 272.80 100.0% LL 211 272.80 100.0% PL lot 272.80 100.0% PI 3/4" 272.80 100.0% 3/81, 274.70 99.4% #4 278.20 98.2% #10 302.40 90.0% #20 363.30 69.5% Dl 0: 0.060 #40 434.40 45.6% D30: 0.15 #60 483.20 29.2% D60: 0.6 #100 508.20 20.8% Cu: N/A #200 13.1% Cz: N " I 0 co M 01 Coarse Fine Coarse GRAVEL PARTICLE SIZE DISTRIBUTION US STANDARD SIEVE OPENING SIZES ..-- - �&^ ji-IM 190nn urain oizu kiiiiii) Medium Fine SAND —W— SAMPLE ID DEPTH (ft) LL 4.4% BH-1 2.5-4 S-1 PROJECT: CITY OF RENTON] HIGHGATE SEWER / WA PROJECT NO.: 993-1606.200 DATE: 11/1/99 FINES (Silt or Clay) pL PI GS—CS DESCRIPTION SM Brownish Gray, F-M SAND, some silt, trace fine gravel 0 GOLDER ASSOCIATES, INC. TECH: TCM REVIEW: TCM REDMOND,WA GOLDER ASSOCIATES, INC. -- REDMOND, WA GRAIN SIZE ANALYSIS -- WASH SIEVE ASTM D1 140 / D422 PROJECT: CITY OF RENTON / HIGHGATE SEWER / WA PROJECT NO: 993-1606.200 DATE: 11/1/99 TECH: TCM REVIEWER: TCM BOREHOLE BH-3 SAMPLE S-2 DEPTH (ft) 7.5-9 Description: Light Yellowish Brown, F-M SAND, little silt, trace f gravel USCS: SW - I NATURAL MOISTURE C Gravel 0.0% Tare Number F Gravel 1.5% Wet Weight + Tare (g) C Sand 4.8% Dry Weight + Tare (g) 738-10 M Sand 35 1 0/c Tare Weight (g) 310.40 F Sand Water Content 20.4% Fines Sieve Retained Passing (g) cum. tare 310.40 3" 310.40 100.0% LL 2" 310.40 100.0% PL ill 310.40 100.0% PI 3/411 310.40 100.0% 3/811 310.40 100.0% #4 316.80 98.5% #10 337.20 93.7% #20 394.20 80.4% DI 0: 0.075 #40 487.40 58.6% D30: 0.25 #60 608.80 30.206 D60: 0.4 #100 668.60 162% Cu: 5.9 #200 695.901 9.9% Cz: 1 CM C ca CL 0-01 PARTICLE SIZE DISTRIBUTION US STANDARD SIEVE OPENING SIZES 1 .11 - AAn 4pn �Yinn *200 Coarse I Fine GRAVEL urain ziize trinn) Coarse Medium ine --L- SAND FINES (Silt or Clay) W% LL PL PI USCS DESCRIPTION SAMPLE ID DEPTH (ft) SW Light Yellowish Brown, F-M SAND, little silt, trace f gravel 0 BH-3 S-2 7.5-9 20.4% PROJECT: CITY OF RENTON / H IGHGATE SEWER / WA GOLDER ASSOCIATES, INC. PROJECT NO.: 993-1606.200 DATE: 11/1/99 TECH: TCM REVIEW: TCM REDMOND,WA GOLDER ASSOCIATES, INC. -- REDMOND, WA GRAIN SIZE ANALYSIS -- WASH SIEVE ASTM D1 140 / D422 PROJECT: CITY OF RENTON / HIGHGATE SEWER / WA PROJECT NO: 993-1606.200 DATE: 11/1/99 TECH: TCM REVIEWER: TCM BOREHOLE BH-5 SAMPLE S-3 DEPTH(ft) 12.5-14 Description: Light Brownish Gray, silty fine to medium sand USCS: NATURAL MOISTURE C Gravel 0.0% Tare Number F Gravel 0.0% Wet Weight + Tare (g) 748.00 C Sand 0.6% Dry Weight + Tare (g) 673.20 M Sand .9% 1149 ,- Tare Weight (g) 314.80 F Sand 39.20/61 Water Content (0/6) 20.9% Fines 48.4%1 Sieve Retained Passing (g) cum. tare 314.80 3" 314.80 100.0% LL 2" 1 314.801 100.0% PL I -- 1 314.80 1 100.0% PI 3/4" 1 314.801 100.0% 3/8" 314.80 100.0% #4 314.80 100.0% #10 316.80 99.4% #20 324.70 97.2% D10: 0.004 #40 359.30 87.6% D30: 0.02 #60 430.60 67.7 D60: 0.2 #100 468.30 57.2% Cu: rN*/A #200 4 9 9. 700 48.4% Cz: N/A 1 ca 0- I 0-01 Coarse Fine Coarse GRAVEL 154. PARTICLE SIZE DISTRIBUTION US STANDARD SIEVE OPENING SIZES - - A&^ Aq M 199M Lirain oiztj ki i ii i i) Medium Fine - I - SAND SAMPLE ID DEPTH (ft) W% B jT--5— —12.5-14 20.9% S-3 FINES (Silt or Clay) pL pl uscs DESCRIPTION LL SM Light Brownish Gray, silty fine to medium sand 0 PROJECT: CITY OF RENTON / HIGHGATE SEWER / WA PROJECT NO.: 993-1606.200 DATE: 11/1/99 GOLDER ASSOCIATES, INC. TECH: TCM REVIEW: TCM REDMOND,WA GOLDER ASSOCIATES, INC. -- REDMOND, WA GRAIN SIZE ANALYSIS -- WASH SIEVE ASTM D1 140 / D422 PROJECT: CITY OF RENTON / HIGHGATE SEWER / WA PROJECT NO: 993-1606.200 DATE: 11/1/99 TECH: TCM REVIEWER: TCM BOREHOLE BH-6 SAMPLE S-3 DEPTH (ft) 12.5-14 Description: Gray, F SAND, some silt USCS: NATURAL MOISTURE Tare Number Wet Wei g ht + Tare (g) Dry Weight + Tare (g) Tare Weight (g) Water Content (%) 674.40 610.7'0 312.60 21.4%, C Gravel F Gravel C Sand M Sand F Sand Fines 0.0% 0.0% 0.2% 2 1 0/c Sieve Retained Passing (g) CUM. tare 312.60 311 312.60 100.0% LL 211 312.60 ' 100.0% PL ill 312.60 100.0% PI 3/411 312.60 100.0% 3/811 312.60 100.0% #4 312.60 100.0% #10 313.10 99.8% #20 314.00 99.5% D10: 0.060 #40 319.40 97.7% D30: 0.09 #60 339.00 91 1% D60: 0.2 #100 419.50 64.1% Cu: N/A #200 548.801 20.8% Cz: N/A 0 0) C ca il. -0 01 Coarse Fine GRAVEL SAMPLE ID BH-6 S-3 PARTICLE SIZE DISTRIBUTION US STANDARD SIEVE OPENING SIZES -4A won AAn *An oloo #200 Grain size prn) Coarse Medium Fine SAND FINES (Silt or Clay) 1 DEPTH (ft) LL PL PI uscs DESCRIPTION 12.5-14 21.4% SM Gray, F SAND, some silt 0 PROJECT: CITY OF RENTON / HIGHGATE SEWER / WA PROJECT NO.: 993-1606.200 DATE: 11/1/99 GOLDER ASSOCIATES, INC. TECH: TCM REVIEW: TCM REDMOND, WA CITY OF RENTON g4�R Planning/Building/Public Works Department ayor Gregg Zimmerman P.E., Administrator July 12, 1999 Ken Sargent ENTRANCO 10900 NE 81h Street, Suite 300 Bellevue, WA 98004 SUBJECT: WETLAND DELINEATION REPORT Dear Ken: Enclosed is a copy of a wetland delineation report that your firm prepared for the City of Renton's Higate Sewage Lift Station Report. The report is required for the City's SEPA process for projects on or adjacent to wetlands. However, the City's ordinance states that wetland delineation reports are valid for a period of 2 years. To avoid redoing the report, the City's Planning Department has requested that I obtain a letter from your firm confirming that the report is still valid. We request that your firm perform a review of this report and if it you find it to still be valid, prepare a letter to that fact. If any significant modifications need to be made to the report, please call me at 425-430-7279. Thank you. Sinc ely, ohn HobsZon Wastewater Utility 1055 South Grady Way - Renton, Washington 98055 (9 This paper rontains 50% recycled material, 20% post consurner 07/26/99 09:30 FAX ENTRANCO ENG. l&01/001 430 ENTAANCO [—July 26, 1999 Planning/Building/Public Works Department 1055 South Grady Way Renton, Washington 98055 Attention: Mr. John Hobson Letter Authorization Review of Wetland Delineation Report for Higate Sewage Lift Station 10900 NE BTH STREET Dear John: SUITE 300 Post -it® Fax Ncte 7671 Date. peges"� To 5—bylvi r 63,c-,JOY) From CO. Co./Dept. v Phone # Phone # _ 7 Fax # tJ ;L'5- 1130 Fax # BELLEVUE This letter is to confirm that on July 12, 1999 you requested that Entranco perform a review of the wetland delineation report prepared by Entranco for the Higate Sewage WASHINGTON Lift Station dated December 1996 (Entranco Project No. 96038) to confirm that the 9OD04_440S report is still valid. Entranco will review the report, conduct one site visit, and prepare a letter summarizing our findings. TELEPHONE I As a rough estimate, this work will require the following effort: 42S 4S4 S600 TOLL FREE 000 454 5601 FAX 425 454 0210 INTERNET www.entranco.com ARIZONA CALIFORNIA IDAHO OREGON UTAH WASHINGTON Labor Hours C:1 Labor Cost $740 Expenses $50 To confirm your request for Entranco to perform the above described task, please sign below and return a copy of this letter to me, by FAX, in order to expedite this work. Please call if you have any questions, or wish to discus!, this authorization prior to signing. Sincerely, ENTANCO ✓V v n S nt Project Man, GROU P S\06 -W ATERICONT-991HIGAT WET. DO C ZRG: AC Jo obs n tewater 1-10ity (Date) Post -it Fax Note 7671 Oate ✓�2`7�9� pa°ges� ) To 4�EU From IpH� �� Co./Dept. Co. Phone # Phone # Fax # 40 i 4-4- G,ZZ0 Fax # CBP07eKw (rev. 4M6) HIGATE LIFT STATION ELIMINATION VICINITY MAP SCALE I"=200' CITY OF RENTON PLANNING/BUILDING/PUBLIC WORKS MEMORANDUM DATE: February 28, 1995 TO: John Thompson FROM: John Hobson SUBJECT: HIGATE LIFT STATION ELIMINATION PLAN REVIEW Please review the enclosed plans and return the comments to me by March 31. If you have any questions, call me at X-6179 H:D0CS:95-l80:JDH:ps Enclosure Wetland Delineation Report HIGATE SEWAGE LIFT STATION ELIMINATION Renton, Washington Prepared for AGRA Earth & Environmental 11335 NE 122nd Way, Suite 100 Kirkland, Washington 98034-6918 (206) 820-4669 and City of Renton 200 Mill Avenue South Renton, Washington 98055 (206) 277-6179 Prepared by ENTRANCO 10900 NE 8th Street, Suite 300 Bellevue, Washington 98004 (206) 454-5600 December 1996 CONTENTS Page INTRODUCTION 1 BACKGROUND 1 FIELD INVESTIGATION METHODOLOGY 1 FIELD INVESTIGATION 8 Field Data Results 10 Wetland Delineation Results 14 POTENTIAL WETLAND IMPACTS During Construction 14 During Operation 15 CONCEPTUAL MITIGATION is REFERENCES Published Documents 16 APPENDIX A - Wetland Map from Original Alignment B - Wetland Map from Surrounding Property C - Growing Season Table D - Completed Data Forms E - Earthen Trench Plug 96038 / Report / Wetlands (l 2/1 BY96) / ic I FIGURES Page 1. Project Vicinity 2 2. Proposed New Sewer Line Corridor 3 3. NWI Wetlands in the Project Area 4 4 City Inventory Wetlands in the Project Area 5 5. Wetland Delineation Map 9 TABLES Page 1. Plant Status and Chance of Growing in a Wetland 6 2. Soils in the Project Area 7 96038 / Report / Wetlands (12/18/96) / Jc 11 INTRODUCTION This wetlands investigation is for the proposed Higate Sewer Lift Station Elimination project, which is located in Section 5, Township 23 North, Range 5 East, W.M., and in the City of Renton (figure 1). The proposed new buried sewer line would be located in the northeastern quadrant of the intersection of Jones Avenue NE and NE 20th Street along a 15-foot-wide utility easement (figure 2). The investigation was performed to identify and to delineate the jurisdictional boundary of wetlands within 65 feet of the utility easement. BACKGROUND Two previous wetland studies have been conducted in the project vicinity. These studies were reviewed prior to conducting the current field investigation. The first study was prepared for the original alignment for proposed new sewer line (the original alignment was approximately 120 feet west of the current alignment along NE 20th Street). The results from this investigation indicated wetlands were along only the immediate creek channel and around the existing excavated pond (Appendix A, Phelps 1993). The second investigation was conducted for a private land owner who owns much of the property the proposed new sewer line will cross. The results from this investigation indicated that the wetlands extend across much of the creek valley (Appendix 8, David Evans & Associates 1994). Maps from both the U.S. Fish and Wildlife Service National Wetland Inventory (USFWS NWI) and the City of Renton also were examined to see if these government agencies had identified any wetlands as occurring in the project vicinity. The NWI map (USFWS 1988) indicates a seasonally flooded, palustrine (freshwater) scrub -shrub wetland (PSSC, Cowardin et al 1979) in the project area (figure 3). This site corresponds to the blueberry farm immediately south of NE 20th Street and the existing sewage lift station (which is to be eliminated). The City of Renton's wetland map (Renton 1992) indicates a wetland in the same area, but shows the wetland extending north of NE 20th Street (figure 4). FIELD INVESTIGATION METHODOLOGY The wetland investigation was conducted using the "Routine On -site Determination Method" described in the Corps of Engineers Wetlands Delineation Manual (Environmental Laboratory 1987), as modified (Corps 1991 and 1992). For jurisdictional purposes, wetlands are defined by the U.S. Army Corps of Engineers (Corps) and Environmental Protection Agency (EPA) (Federal Register 1982 and 1980) as: 96038 1 Report I Wetlands (12118196) 1 ic --, , 0 I / (RENTOP0 1562 1 10, 1563 REN70N 1.7 MJ 15781 NW SCALE 1:24000 0 1 MILE 0 a: 4000 5000 6000 7000 FEET 1000 0 1000 2000 3000 1 KILOMETER .5 0 8 . CWASHINGTON] CONTOUR INTERVAL 25 FEE7 NATIONAL GEODETIC VERTICAL DATUM OF 1929 QUADRANGLE LOCATION -.,Wetland Delineation Report ...Higate. Sewage Lift Station 430 ENTRANCO Figure 1 Project Vicinity N. . z N U. U. z '0 19 .30 I lot z . . Z. 0 lot 4 3 f-4 5 '/A . . \A' 40 I -LI& PIP 00 U NJ. 14"" CT NE 20th Street -21 m 1- 0 "Ic Lift Station - Wetland Del ineation* Report fligate Sewage I I 430 ENTRANCO Figure 2 Proposed New Sewer Line Corridor Y -p i rl �,j-,�Cp U� ?,FO m y 0 "N A, h. ? F566 Q.\ \kl tc Kennydale K15B Wf emall) Pain -Z7 i:L f zz -Tz;. W :RF -te- :BM Y� r WL p&roC,( E:, 7 D 1- �)r, ;.7 -Iin'eatian Report H igate...-S e*.wa g—e-: lift' St.ati 'an. Wetland*.De Figure 3 ENTRANCO NWI Wetlands in the Project Area r N S-17 W3K LLJ i S-9 it > W -517 �N 1 K WAK co V-3 S26K 4W-47 k W2K �J W —23 S28K w -26 S-10 S-13 N.E.. 27TH 'GT01V ET rr Lall W-29 > < S-1 1 J V NE 20t. street ROJECT LOCATION S_, L S-18 S i IL 0 CL --FIGURE #3 CITY OF RENTON WETLANDS INVENTORY MAP Cn HAMMOND. COLLIER & WADE LIVINGSTONE ASSOCIATES. INC. keport Higate Sewage Lift Station - Wetland Delineation Figure 4 ENTRANCO City Inventory Wetlands in the Project Area "Those areas that are inundated or saturated by surface or ground water at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs, and similar areas." The presence of the three essential wetland characteristics (i.e., wetland vegetation, soils, and hydrology) were examined by looking for positive indicators of each characteristic. Examination for wetland (hydrophytic) vegetation is done within different plant communities (i.e., communities that are composed of significantly different species of plants). Each plant community along the suspected wetland/non-wetland boundary is identified and described and a data point is selected in each different plant community. Plant species are identified around that data point for each different stratum (e.g., tree, sapling, shrub, and herb). The sampling area around the data point is a 30-foot radius for the tree stratum and a 5-foot radius for the sapling, shrub, and herb strata. Through visual estimating, the plants are given a percentage of coverage in each stratum sampling area. The dominant plants in each stratum are determined by selecting plants which have a coverage of 20 percent for each stratum. These plants are included on the list of dominant species. Plant species were identified using the Flora of the Pacific Northwest (Hitchcock and Cronquist 1973). Plants were further identified as to the estimated probability of their chance of occurring in wetland and non -wetland environments, based on the National List of Plant Species That Occur in Wetlands (Reed 1988a, 1988b, and 1993 and Corps 1994) as shown in table 1. Table 1 Plant Status and Chance of Growing in a Wetland Indicator Categories Symbol Estimated Probability Obligate Wetland OBL >99% Facultative Wetland FACW 67%-99% Facultative FAC 34%-66% Facultative Upland FACU 1%-33% Obligate Upland UPL <1% The dominant species and their indicator category for all strata are combined together to determine if the identified dominant vegetation meets the criteria that wetland plants 96038 1 Report I Wetlands (12/18196) / ic 6 comprise most of the plant community. In general, the criteria to meet the wetland vegetation requirements occurs when the dominant plants that have an OBL, FACW, and/or FAC indicator (see table 1) account for more than 50 percent of the total list of dominant species. When this "greater than 50 percent" threshold occurs, the data point is said to have a positive presence of wetland vegetation. In addition to the percent coverage method, there are other indicators for identifying wetland vegetation. If the plants are observed to be growing under saturated or inundated conditions during the growing season, regardless of the indicator status, the plants should be considered as acting like wetland plants. Morphological, physiological, and reproductive adaptation, and evidence from technical literature also are used to determine if the plant is acting as wetland vegetation. If there is strong evidence of these other indicators, the plant community should be said to have a positive presence of wetland vegetation. Examination for wetland (hydric) soils starts by digging a pit at the data point and assessing the soil characteristics. Indicators for hydric soils include: (1) organic soils; (2) histic epipedons; (3) sulficlic materials; (4) aquic or peraquic moisture regimes; (5) direct observation of reducing soil conditions; (6) gleyed, low chroma, and low chroma/ mottled mineral soils; (7) soils on the local or national hydric soils list (note: care must be taken here so as not to include remnant hydric soils); (8) iron and manganese concretions; and (9) coarse textured or sandy hydric soils that have high organic matter content in the surface margin, dark vertical streaks of organic matter in subsurface horizons, or an organic pan (i.e., wet spodosol, an organic layer "floating" underground at the water table). Mineral soils were examined using the Munsell Soil Color Charts (Kollmorgen 1988) and the soil characteristics of the project area were reviewed with the Soil Sul -Vey King County, Washington and King County Area Hydric Soils List (USDA Soil Conservation Service 1973 and 1989) for hydric soil indicators (table 2 and Appendix B). Soils with a hydric inclusion are soils that, for mapping purposes and constraints, can have small patches of wetland soils (hydric soils) included in the soil area. Table 2 Soils in the Project Area Soil Hydric Sym. Soil Name Slope Hydric Inclusion Inc Indianola loamy fine sand 4-15% no no Sm Shalcar muck 0-1% yes n/a 96038 1 Report I Wetlands (12118/96) / jc Examination for wetland hydrology starts by visually scanning across the site and in the soil pit, to check for indicators of wetland hydrology. These primary field indicators, in descending order of reliability, include: (1) visual observation of inundation; (2) visual observation of soil saturation in the upper 12 inches; (3) water marks; (4) drift lines; (5) water -borne sediment deposits; and (6) wetland drainage patterns. Secondary field indicators include evidence of: (1) oxidized root channels (rhizospheres) associated with living roots and rhizomes in the upper 12 inches; (2) water stained leaves; (3) local soil survey data; and (4) FAC-neutral test (note: Corps approval is required to use this test). The manual further defines the jurisdictional timing and duration of inundation and soil saturation to meet the hydrology criteria. Non -tidal areas that have a duration of inundation and/or soil saturation greater or equal to 5 percent of the growing season may have wetland hydrology. Sites with 12.5 percent or greater duration of the growing season are considered to have a positive presence for wetland hydrology. The growing season is defined as surface temperatures greater than 28 degrees Fahrenheit, for at least 50 percent of the year. The growing season for the site was determined as being 253 days long based on the USDA Soil Conservation Service (now the Natural Resources Conservation Service) Soil Survey for King County Area, Washington (USDA SCS 1973) (Appendix C). The 5 and 12.5 percentages translate into roughly 13 and 32 days, respectively. FIELD INVESTIGATION The field investigation was conducted on August 7 and 8, 1996. The weather during the field investigation was sunny and hot. Since the field examination occurred during the driest time of the year, professional judgment was used in some cases, to determine the presence of wetland hydrology. Nine data points were located on the site to look for positive indicators of the three essential wetland characteristics: wetland (hydrophytic) vegetation, wetland (hydric) soils, and wetland hydrology. Data gathered was used to determine the boundary of the project wetland. These data points correspond to the soil pits (SP) and were numbered SP1 through SP9 on pink survey flagging. Cross ditches over the utility easement were also labeled and flagged with pink survey tape. The data points are shown on figure 5, the completed data forms are attached as Appendix D. Soils colors were taken from wet samples unless noted otherwise. 96038 1 Report / Wetlands (12/18196) / ic 0 W Wr go 14; s =W.- ma Sewer Construction Easement M A w .. . . ........ . .... ..... . ...... .......... . ...... . .......... h Blueberry Farm 01 (D (D w go 11 J4 WETLAND --; , W +1 W Ir Higate Creek CL cr sea a,qM 'W'sab M- owes -%a,# P nd WETLAND it Iaaa- NC,tl--Vk II-ANI) U) Oil Slngle-Famlly�Resldences Legend 0' Wetland Buffer N 0 sp-, soil Pit -5 h. U1 AA1-1 Wetland Flag --w — Delineated Wetland Boundary Jones Avenue NE Approximate Wetland Boundary Er- 50' Buffer Zone K id Higate Sewage Lift Station Welland Delineation Report Figure 5 ENTRANCO Wetland Delineation Map Field Data Results Data Point 1. The data point is located in roughly the mid -point along the north/south leg of the new sewer line corridor, and in a scrub -shrub plant community dominated by hardhack (Spiraea douglash), lady fern (Athyrium fifix-femina), giant horsetail (Equisetum telmateia), and Himalayan blackberry (Rubus procera). These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP1) was dug to a depth of 12 inches to look for positive indicators of hydric soils and wetland hydrology. Although the soil was organic (a hydric soil indicator), the soil color was still examined. The soil was determined to be a 1 OYR 2/1 color throughout the core. With the organic soil, hydric soils were considered to be present. The soil pit was saturated to the surface and free standing water was 6 inches below the surface. The wetland hydrology characteristic was considered to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 2. The data point is located south of Data Point 1 up a small knoll, and is in a scrub -shrub plant community dominated by Himalayan blackberry, giant horsetail, and hedge bindweed (Convolvulus sepium). Although not listed as a wetland plant, the blackberry is known to be a vigorous grower in seasonally flooded wetlands. In this case, the blackberry was considered to be acting as a wetland plant, based on the shallow water table. The positive presence of hydrophytic vegetation was assumed. A soil pit (SP2) was dug to a depth of 15 inches to look for positive indicators of hydric soils and wetland hydrology. The soil was organic (a hydric soil indicator) in the upper 6 inches and mineral below this. The soil color was examined in the sandy mineral soil and was determined to be a 1 OYR 3/2 color. A strong sulfidic odor was also present in the soil. With the 6-inch organic soil layer (histic epipeclon) over the saturated sandy soil, hydric soils were considered to be present. The soil pit was saturated at 12 inches and free standing water occurred 15 inches below the surface. The typical groundwater level was assumed to be much higher at the beginning of the growing season (March). The wetland hydrology characteristic was considered to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 3. The data point is located west of Data Point 1, up on a slight mound. The data point is in a plant community dominated by red alder (Alnus rubra), giant horsetail, and Himalayan blackberry. These plants together indicate the presence of hydrophytic vegetation. 96038 / Report / Wetlands (12118/96) / ic 10 A soil pit (SP3) was dug to a depth of 18 inches to look for positive indicators of hydric soils and wetland hydrology. The soil has an organic layer (a hydric soil indicator) in the top 12 inches and a mineral soil below. The silty textured mineral soil was determined to be a 1 OYR 3/1, with mottles of a 1 OYR 4/4 color. With the organic soil layer (histic epipedon) over the low chroma, silty mineral soil, hydric soils were considered to be present. No water or saturation was observed in the soil pit. But due to the proximity and shallow elevation change from the surrounding area determined to be a wetland, the soil pit would be expected to be saturated within 12 inches of the surface, at the beginning of the growing season, for a sufficient duration to meet the jurisdictional hydrology requirements. The wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 4. The data point is in a disturbed plant community (i.e., front yard of a house and maintained as a lawn) just north of NE 20th Street, and is dominated by creeping buttercup (Ranunculus repens), velvet grass (Holcus lanatus), horsetail (Equisetum sp., likely telmateia), and unidentifiable grasses (due to the mowing). These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP4) was dug to a depth of 12 inches to look for positive indicators of hydric soils and wetland hydrology. Although the soil was organic throughout the core (a hydric soil indicator), the soil color was still examined. The soil was determined to be a 1 OYR 2/1 color in the upper 12 inches and 7.5YR 2/0 below that point in the core. With the organic soil, hydric soils were considered to be present. The soil pit was saturated to 4 inches from the surface and free standing water occurred 6 inches below the surface. The wetland hydrology characteristic was considered to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 5. The data point is located north of Data Point 1, next to a fallen and grown over barn. The data point is in a scrub -shrub plant community dominated by reed canarygrass (Phalaris arundinacea), giant horsetail, and Himalayan blackberry. These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP5) was dug to a depth of 18 inches to look for positive indicators of hydric soils and wetland hydrology. Although the upper part of the soil was organic (a hydric soil indicator), the soil color was still examined for the mineral soil below. The soil was determined to be a 1 OYR 3/2 color (dry) in the sandy/mucky soil from 0 to 7 inches. From 7 to 14 inches, the sandy loamy soil was determined to be a 1 OYR 5/2 color with 96038 1 Report I Wetlands (12/16/96) 1 ic 11 abundant mottles of both 7.5YR 4/4 and 7.5YR 5/6 colors. Below 14 inches, the soil was a 1 OYR 5/2 color with mainly 1 OYR 5/6 colored mottles. With the low chroma, mottled mineral soil, hydric soils were considered to be present. The soil pit was saturated to a depth of 14 inches below the surface, however, free standing water was not observed in the soil pit. Based on the depth of saturation (i.e., close to 12 inches below the surface) and time of year during the field investigation, the wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 6. The data point is just upslope to the north of Data Point 5 and is in a scrub -shrub plant community dominated by Himalayan blackberry, which by itself, does not indicate the presence of hydrophytic vegetation. A soil pit (SP6) was dug to a depth of 24 inches to look for positive indicators of hydric soils and wetland hydrology. The sandy mineral soil was determined to be a 10YR 3/2 color, with no mottles, from 0 to 10 inches deep, 1 OYR 4/4 from 10 to 24 inches deep, and 1 OYR 5/4, with some slight soil discoloration noticeable. With no hydric indicators observed in the mineral soils, hydric soils were not considered to be present. No indicators of wetland hydrology was observed in the soil pit or surrounding area. The wetland hydrology characteristic was not considered to be present. This data point was determined not to be a wetland since none of the essential wetland requirements were met. Data Point 7. The data point is located on the northern portion of the project, along the east/west leg of the new sewer line corridor in a scrub -shrub plant community dominated by Himalayan blackberry, giant horsetail, hardhack, and red alder. These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP7) was dug to a depth of 24 inches to look for positive indicators of hydric soils and wetland hydrology. The sandy mineral soil was determined to be a 1 OYR 3/1 (dry) color to 10 inches deep, and a 1 OYR 6/2 (dry) color, with abundant 7.5YR 4/6 mottles from 10 to 24 inches deep. With the low chroma, mottled mineral soil, hydric soils were considered to be present. No inundation or saturation was observed in the soil pit during the field investigation. However, based on the proximity and relative location in the topography to the creek, the site would likely have sufficient water during the beginning of the growing season to meet the hydrology criteria. With this in mind, the wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. 96038 1 Report / Wetlands (12118/96) / ic 12 Data Point 8. The data point is located upslope from Data Point 7, and is in a scrub - shrub plant community dominated by Himalayan blackberry, salmonberry (Rubus spectabilis), and red alder. These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP8) was dug to a depth of 24 inches to look for positive indicators of hydric soils and wetland hydrology. All soil colors were determined using dry samples. The sandy mineral soil was determined to be a 10YR 2/1 color from 0 to 9 inches deep, 10YR 6/2.5, with very slight 10YR 5/6 mottles from 9 to 18 inches deep, and 10YR 6/2, with strong 1 OYR 4/6 mottles from 18 to 24 inches deep. Although slight, the mottling in the low chroma mineral soil appear sufficient to meet the wetland soils criteria. Hydric soils were considered to be present. No indicators of wetland hydrology were observed in the soil pit or surrounding area. Based on the proximity and higher elevation relative to the creek, the site would likely not have sufficient water during the beginning of the growing season to meet the hydrology criteria. The wetland hydrology characteristic was not considered to be present. This data point was determined not to be a wetland since only two of the essential wetland requirements were met. Data Point 9. The data point is located in the field (likely old pasture) north of the new sewer line corridor and west of the creek. The data point is in an emergent plant community dominated by reed canarygrass, giant horsetail, soft rush (Juncus effusus), creeping buttercup, and quackgrass (Agropyron repens). These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP9) was dug to a depth of 18 inches to look for positive indicators of hydric soils and wetland hydrology. All soil colors were determined using dry samples. The sandy mineral soil was determined to be a 1 OYR 3/2 color, with no mottles, from 0 to 9 inches deep, and a 1 OYR 5/2 color, with both 1 OYR 5/6 and 7.5YR 4/4 colored mottles from 9 though 18 inches deep. With the mottled, low chroma mineral soil, hydric soils were considered to be present. No inundation or saturation was observed in the soil pit during the field investigation. However, based on the proximity and position in the landscape relative to the creek, the site would likely have sufficient water during the beginning of the growing season to meet the hydrology criteria. With this in mind, the wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. 96038 / Report / Wetlands (12118196) 1 ic 13 Wetland Delineation Results The wetland was flagged with blue survey tape and marked as assessment area AA-1 through AA-12 with in the project corridor. The wetland boundary outside of the corridor was visually estimated. The wetland is directly connected to the creek corridor and is fed by surrounding seeps in several locations. The entire wetland is estimated to be roughly 5-8 acres in size. Though historically used as a pasture, and now overgrown with blackberry and red alder, the wetland would meet the criteria as a Category 2, High Quality Wetlands, since the site is a headwater wetland (Renton 1992b). Category 2 wetlands require a standard buffer of 50 feet. The disturbed portion of the wetland (i.e., residence next to NE 20th Street), would, by itself, meet the criteria as a Category 3, Lower Quality Wetlands. This is based on the presence of fill for the house and garages. Category 3 wetlands require a standard buffer of 25 feet. However, since this area is connected to the main portion of the wetland, this disturbed area also would be considered a Category 2 wetland with a 50- foot buffer. The creek would have a buffer of 25 feet. Any activity in the wetlands may require permits from federal, state and city resource agencies. These permits may include: Perm it/App roval/R eview Resource Agency Section 404, Nationwide Permit U.S. Army Corps of Engineers Water Quality Modification Washington State Department of Ecology Hydraulic Project Approval (HPA) Washington State Department of Fish and Wildlife SEPA Review Wetland Permit City of Renton City of Renton POTENTIAL WETLAND IMPACTS Based on the most current plan set (11/1/95), the impacts to the wetland were estimated for activities during construction and during operation. Cumulative and secondary impacts are not addressed in this report, since the project details are not completed. Cumulative and secondary impacts, however, should be considered and included as part of the wetland mitigation plan preparation. During Construction Impacts during construction are those which may temporarily affect the wetland's vegetation, soils, and hydrology. The project utility corridor is 15 feet wide and the 96038 / Report I Wetlands (12/18/96) / ic 14 construction easement corridor is approximately 15 feet wide. Construction for the new sewer line would likely affect all the wetlands in these corridors. The 30-foot-wide construction corridor would impact roughly 13,350 square feet of wetlands. The construction also would impact 6,600 square feet of wetland buffer area. Material storage is expected to occur outside of the wetlands. During Operation Impacts during operation are those which may permanently affect the wetland's vegetation, soils, and hydrology. No permanent impacts are anticipated for the proposed project. CONCEPTUAL MITIGATION As with impacts, mitigation can be for temporary impacts (construction) and permanent impacts (operation). Typically, temporary impacts to wetlands can be mitigated by restoring the site after construction. However, mitigation criteria set at the beginning of construction can minimize the impacts and aid in the wetlands recovery. Mitigation for temporary impacts, in no particular order, may include: e narrow the construction corridor to minimize the amounts of wetlands disturbed • protect large trees in the corridor and wetlands out of the corridor, with clearing limit fencing • cut the vegetation to leave short stems and roots for rapid regrowth • use log mats or geotech fabric and hogfuel to limit soil disruption • stockpile surplus soils away from wetlands • use earthen trench plugs periodically to avoid "piping" along new sewer line (refer to a typical detail in Appendix E). • maintain subsurface cross water flow, by using either a drainage blanket or pipes • discharge water pumped out of the construction trench to points outside of wetlands, possibly using the current sewer system, or do not drain the trench and "work in the wet" • construct only during dry weather and within the HPA fisheries window • separate and bypass flowing water in the ditches and creek from the construction trench 96038 /Report I Wet lands (12/la/96) / jc 15 reuse existing hydric soils and reshape the landscape to pre -construction conditions * revegetate the disturbed wetland and buffer with native plant species. * maintain and monitor the revegetated areas to assure adequate establishment of the native vegetation Mitigation for permanent impacts may need to follow the criteria in the Wetland Management Ordinance (Renton 1992b) to compensate for any permanent loss of wetlands. Mitigation can be creation of new wetlands from upland areas or restoration of degraded wetland areas. In case there were to be impacts to the wetlands, the Category 2, scrub -shrub wetlands permanently affected would need to be compensated at a 2:1 ratio. Wetland buffers permanently lost also would require mitigation. If needed, a potential mitigation site could be the reed canarygrass dominated wetland plant community along the new sewer line corridor. This site is located just north of the lot along NE 20th Street. Mitigation at this location could be in the form of a wetlands restoration effort. If permanent impacts were to occur, a mitigation report and plan would need to be created when specific impacts are determined., A mitigation report would contain the environmental goals and objectives, performance standards, wetland construction plans, monitoring plans, and a contingency plan for the mitigation effort. However, with no permanent impacts anticipated for the project, no creation mitigation for replacement wetlands is expected. REFERENCES Published Documents Adamus, Paul R., Ellis J. Clairain, R. Daniel Smith and Richard E. Young 1987 Wetland Evaluation Technique (WET); Volume 11: Methodology, Operational Draft Technical Report Y-87- 7 U.S. Army Corps of Engineers Waterways Experiment Station, Vicksburg, MS. Cowardin, Lewis M., Virginia Carter, Francis C. Golet and Edward T. LaRoe 1979 Classification of Wetlands and Deepwater Habitats of the United States. Prepared for the Office of Biological Services, Fish and Wildlife Services, U.S. Department of Interior, Washington DC, FWS/OBS-79/31. David Evans and Associates 1994 Wetland Delineation Letter. Prepared for private landowner. 96038 1 Report / Wetlands (12/18/96) / ic 16 Environmental Laboratory 1987 Corps of Engineers Wetland Delineation Manual (1987 Manual). Technical Report Y-87-1, U.S. Army Engineers Waterways Experiment Station, Vicksburg, Mississippi. Federal Register 1991 33 CFR Part 330: Nationwide Permit Program Regulations and Issue, Reissue, and Modify Nationwide Permits; Final Rule. Part III Department of Defense, Corps of Engineers, Department of the Army, Vol. 56, No. 226, US Government Printing Office, Washington, D.C. November 22. 1982 Title 33: Navigation and Navigable Waters; Chapter 11, Regulatory Programs Corps of Engineers., Vol. 47, No. 138, p. 31810, US Government Printing Office, Washington, D.C. 1980 40 CFR Part 230: Section 404(b)(1) Guidelines for Specification if Disposal Sites for Dredged or Fill Material, Vol. 45, No. 249, pp. 85352-85353, US Government Printing Office, Washington, D.C. Hitchcock, Leo C. and Arthur Cronquist 1973 Flora of the Pacific Northwest: An Illustrated Manual. University of Washington Press. 1990 edition. Kollmorgen Instruments Corporation 1988 Munsell Soil Color Charts. Baltimore, MD. Kunze, Linda M. 1987 Puget Trough Freshwater Wetlands, A summary of Biologically Significant Sites, Phase II: Southern Puget Trough Impounded Wetlands. Washington Natural Heritage Program. Prepared for the Washington State Department of Ecology. Phelps, Marilyn (Cascade Environmental Services) 1993 Wetland Delineation Report. Prepared for City of Renton. Puget Sound Water Quality Authority (PSWQA) 1994 Puget Sound Water Quality Management Plan Reed, Porter B., Jr. 1993 1993 Supplement to the List of Plant Species that Occur in Wetlands: Northwest (Region 9). U.S. Fish and Wildlife Service. 1988a National List of Plant Species that Occur in Wetlands: National Summary. U.S. Fish and Wildlife Service, Biological Report 88(24). 1988b National List of Plant Species that Occur in Wetlands: Northwest (Region 9). U.S. Fish and Wildlife Service, Biological Report 88(26.9). 96038 / Report I Wetlands (12/18/96) / ic 17 Renton, City of 1992 Critical Areas Inventory Maps. Prepared with assistance from Jones and Stokes, and R.W. Beck. 1992b Wetland Management Ordinance. Chapter 32. U.S. Fish and Wildlife Service 1988 Mercer Island Quadrangle, National Wetland Inventory. U.S. Army Corps of Engineers (Corps) 1994 1993 Supplement to National List of Plant Species that Occur in Wetlands: Northwest (Region 9). March 31. 1992 Clarification and Interpretation of the 1987 Manual. Guidance memorandum. March 6. 1991 Questions & Answers on 1987 Corps of Engineers Manual. Guidance memorandum. October 7. 1990 Permit Requirements for Wetland Fill Projects. Information Paper. Seattle District. April 17. USDA Forest Service 1985 Management of Wildlife and Fish Habitats in Forests of Western Oregon and Washington, Part 1 - Chapter Narratives. Pacific Northwest Region. Published in cooperation with the U.S. Department of the Interior, Bureau of Land Management. USDA Soil Conservation Service 1989 King County Area Hydric Soil List. 1973 Soil Survey of King County Area Washington. Washington Natural Heritage Program (NHP) 1994 Endangered, threatened and sensitive vascular plants of Washington. Department of Natural Resources, Olympia. Washington State Department of Ecology 1993 Wetland Rating System. 96038 1 Report / Wetlands (12/18/96) 1 ic 18 APPENDIXA Wetland Map from Original Alignment WETLAND #2 AREA ADJACENT d .150 TO EXISTING 112 POND 204 101 05 137 2446 - ;a 129 is! "3 121. 2m ?, - - z 5 Z'L* :rF- :' 21Z �o 1'o N Ill. 130 151 155 Kil- ls na In 209 I IL n u 4 �6­ Z 13 Z34.z:z., 183 271 270 0 (7 R e- t—ly- )r '22Aa 220 213 -225 21V 22 7 2%3. 304. z! "'t\ w 298 2", 227, 1 X) SS -Q 241 223 . . "73 29" 4 LIT. 238 SCALE 1 80 FEET C 2-0 273 0 311 LLi ;i Ld z 0 1 4 3Qqw 3, 31. 13, [—A'. 2" WETLAND 93 SMALL DITCH TRIBUTARY TO .3 CREEK 324 323 326 V LA fz^ 127 r is (321, �31 -POHL RESIDENCE Is' _j 373 374 j 376 47 LARGE PASTURE WETLAND #1 EAST BANK OF CREEK, NORTH OF KAY RESIDENCE DR. KArS PROPERTY 3" �.2 364 3" 1 '43 ! 2 4-­ 303 3" 14-11221 �-7 446 3fio 40 N. E 20TH STREET _311s_ __in .54 - 411 5, 5" FIGURE #4 PROJECT AREA SURVEY MAP EXISTING BERRY FARM —HAMMOND, COLLIER & WADE LIVIN GSTONE ASSO CIATES, INC. APPENDIX B Wetland Map from Surrounding Property m L A P(L L 13P 1H. ""Fc V 1 4 1 1 APPENDIX C Growing Season Table TABLE 10. —PROBABILITY OF FREEZING TEMPERATURES AFTER Probability in spring Station Te.mre rature 90 75 50 25 10 percent percent percent percent percent 07� Bothell 2 N. 32 Apr. 18 Apr. 30 May 13 May 27 June 7 (elevation 100 feet) 28 Mar. 19 Mar. 30 Apr. 13 Apr. 27 May 8 24 Feb. 7 Feb. 21 mar. 8 Mar . 2 1 Anr. 2 Cedar Lake 32 Mar. 21 Apr. 2 kor. 15 Apr. 28 May 11 (elevation 1,560 feet) 28 Feb. 11 Mar. I Mar. 16 me-r. 30 Apr. 11 24 (L/) Jan. 29 Feb. 14 Mar. I Mar. 15 Landsburg 32 Apr. 15 A -or. 27 I -lay 10 May 24 June 4 (elevation 535 feet) 28 Mar. 4 mar. 16 Mar. 29 Anr. 11 ADr. 24 24 Jan. 8 Feb. 4 Feb. 19 Mar. 5 Mar. 18 Monroe 2 WSW. 32 Mar. 21 Apr. 3 ADr. 16 Apr. 30 May L2 (elevation 120 feet) 28 Feb. 21 Mar. 5 mar. 19 Apr. I Apr. 14 24 ian. 28 Feb. 17 mar. 6 Max. 17 Sea-ctle-Tacorra Airport 32 Mar. 15 Mar. 27 Arr. 9 Apr. 23 may 4 28 Feb. Feb. 23 Mar. 9 Mar. 2.3-- A -Dr. 4 24 Jan. 18 Feb. 9 Feb. 25 Mar. 9 Seattle University of Washington 32 Feb. 26 Mar. 10 Mar. 23 Apr. 6 ADr. 17 (elevation 113 feet) 28 Jan. 10 Feb. 2 Feb. 17 Mar. 2 24 (i/) Jan. 17 Feb. 6 Feb. 19 Snoqualmie Falls 32 ADr. 11 Apr. 23 may 6 May 20 June 1 (elevation 430 feet) 28 mar. 6 Mar. 18 A -or. I Apr.. 14 Apr. 27 24 (i/) Feb. 8 Feb. 24 mar . 10 Mar. 23 Vashon Island 32 Mar. 10 Mar. 23 Apr. 5 Apr. 18 May I (elevation 231 feet) 28 Jan. 14 Feb. 7 Feb. 23 mar. 8 Mar. 21 24 Jan. 21 Feb. 9 Feb. 24 Not reported. 90 SPECIFIED DATES IN SPRING AND BEFORE SPECIFIED DATES IN FALL Probability in fall Period between last occurrence 10 25 50 75 90 in spring and percent percent percent Dercent percent first in fall Days Sept. 12 Sept. 23 Oct. 5 Oct. 17 Oct. 28 145 Oct. 7 Oct. 1B Oct. 30 Nov. 1-1 Nov. 22 200 Oct. 22 Nov. 2 Nov. 15 Dec. 1 252 Oct. 10 Oct. 21 Nov. 2 Nov. 14 Nov. 25 201 Oct. 29 Nov. 9 Nov. 22 Dec. 5 Dec. 27 251 Nov. 13 Nov. 25 Dec. 10 (V) (i/) 299 Sept. 21 Oct. 1 Oct. 14 Oct. 26 Nov. 6 157 Oct. 21 Nov. 1 Nov. 13 Nov. 25 Dec. 6 229 Nov. 7 Nov. 19 Dec. 2 Dec. 21 (1/) 286 Sept. 30 Oct. 1-1 Oct. 25 Nov. 4 Nov. 15 1,00 Oct. 22 Nov. 1 Nov. 13 Nov. 26 (2/,) 239 Nov. 2 Nov. 14 Nov. 27 Dec. 13 T) 283 Oct. 10 Oct. 21 Nov. 2 Nov. 15 Nov. 25 207 Oct. 26 Nov. 5 Nov. 17 Dec. 2 Dec. 16 253 Nov. 20 Dec - 5 Oct. 26 Nov. 6 Nov. 18 Dec. I Dec�. 11 240 Nov. 21 Dec. I Dec. 18 (10 (i/,) 319 Dec. 3 Dec.-lq T) T) 348 Sept. 16 Sept. 27 Oct. 9 Oct. 21 Nov. 1 156 Oct. 16 Oct. 27 Nov. 8 Nov. 20 Dec. 1 221 Nov. 8 Nov. 19 Dec. 2 Dec. 19 (i/) 281 Oct. 15 Oct. 26 Nov. 7 Nov. 19 Nov. 30 216 Nov. 18 Nov. 24 Dec. 9 Dec. 31 289 Dec. 2 Dec. 16 Dec. 31 T) 344 91 468-266 0 - 73 - 6 APPENDIX D Completed Data Forms ROUTINE WETLAND DETERMINATION - DATA FORM - "ica c ner: Nj�,,C=11 Investigator(s): Do Normal Circumstances exist on the site'.) Is the site significantly & recently disturbed? (Atypical Situation) Is the area a potential Problem Area? (explain in final remarks) VEGETATION Dominant Plant Species Stratum Indicator 2. eA Ma ej"�A 3. 4. Percent of Dominant Species that are F-G) OBL, FACW or FAC (excluding FAC-) % 6. 7 8. 9. 10. 1987 MANUAL Sec: Date: Township: County: Range: State: Washington (Yes,) No Plot ID: �71 Yes rAo) TransectID:' Community ID: Yes �V�o Hydrophytic Vegetation Present? Res, No Basis for determination: & / REMARKS: pvo� 0 HYDROLOGY Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12' Aerial Photographs . Saturated in Upper 12" Water Stained Leaves Other Water Marks Local Sail Survey Data None Drift Lines FAC-Neutral Test Sediment Deposfts Other (Explain in Remarks) Drainage Patterns in Wetlands Field Observations Depth of Surface Water. IV A (in.) Depth to Free Water in Pit: (in.) Depth to Saturated Soil: (in.) Wetland Hydrology Present? Yes' No Basis for determination: REMARKS: 0 , I-L- \) SOILS I iel Soils Mapped As: I ory (a b-CAy'.., -�N� ��arA Drainage Class: Field Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color Mottle Colors finchesl Horizon (Munsell Moist) (Munsell Moist) 10\j P- 10\1 ti- 5/40 Hydric Soil rs: Histosol Histic Epipedon Suff idic Odor Aquic Moisture Regime Ye No Hydric Soils Present? (9 Basis for determination: LJW Mottle (Abundance/Contrast) OEM 0-1 -0 MR Reducing Conditions Organic Streaking in Sandy Soils Gleyed or Low Chroma Colors Listed on Local Hydric Soils List Concretions Listed on National Hydric Soils List High Organic Content in Surface Layer in Sandy Soils C,k V 0�,,% CA� . WETLAND DETERMINATION Is this Sampling Point Within a Wetland? Basis for determination: - Z91 0,t� 4-v�� REMARKS: No INVESTIGATOR: po,� �(- ��� ROUTINE WETLAND DETERMINATION - DATA FORM 1987JMANUAL ;P Sec: I Vro �j ite Date: )plica ner: Township: County: aatj I gator(s): Range: State: Washington Do Normal Circumstances exist on the site? �Y-e s) N o Plot ID: Is the site significantly & recently disturbed? (Atypical Situation) Yes r'&O' TransectID: Is the area a potential Problem Area? (explain in final remarks) Yes - N& Community ID: VEGETATION Dominant Plant S Stratum Indicator lMant Plant S12ecies Stratum Indicator o"CA. 2. R�L 7. ACO��, AAaZV /0 W-1 -T— py-L4 3. V,�j J�,vc� -T- 8. SA I 11/ 61 A4,q 4. 9. FA 1O.E.Clu-�%--;' :km- FA :i Percent of Dominant Species that are Hydrophytic Vegetation Present? es No OBL, FACW or FAC (excluding FAC-) L///-7 % Basis for determination: REMARKS: slop HYDROLOGY Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12" Aerial Photographs Saturated in Upper 12" Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Field Observations Depth of Surface Water (in.) Depth to Free Water in Pit-22L4-0n.) Depth to Saturated Soil: fin.) Wetland Hydrology Present? Ye s No, REMARKS: S6� 0 Basis for determination: ,.0 - � � 1 i-la,tj 0 o. SOILS E'a1-01A � 4�� Soils Mapped As: 00 kyl-A �CLZ Drainage Class: Field Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth (inchesl Horizon 6 Matrix Color (Munsell Moist) Hydric Soil Indicators: Histosol Histic Epipedon Suffidic Odor Aquic Moisture Regime Mottle Colors Mottle (Munsell Moist) (Abundance/Contrasfl Texture, Concretions, Structure. etc. C'CkICLAA W/ ") VC. cf. �'i C-- olj Reducing Conditions —4\ Organic Streaking in Sandy Soils Gleyed or Low Chroma Colors Listed on Local Hydric Soils List Concretions Listed on National Hyddc Soils List High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? Ye No REMARKS: Basis for determination:(9, WETLAND DETERMINATION Is this Sampling Point Within a Wetland? Y( INVESTIGATOR: Basis for determination: -A C1 e CV V- YVi ROUTINE WETLAND DETERMINATION - DATA FORM P roject/Site: k '6;-- - Sec: Applicant/(wner: Township: Investigator(s): -7`-/ Range: Do Normal Circumstances exist on the site? No Is the site signif icantly & recently disturbed? (Atypical Situation) %R1 Is the area a potential Problem Area? (explain in final remarks) Yes VEGETATION Dominant Plant Soecies Stratum Indicator i. 04-�b.,) �,sr-ojov FA6 L.� '�O 4— 1 'AA &16 -6, 2. 3' 4. Ams w�V-C-k-' —ry S. Percent of Dominant Species that are OBL, FACW` or FAC (excluding FAC-) REMARKS: HYDROLOGY V"-� ""47" Recorded Data (Describe in Remarks): Stream, Lake or Tide Gauge Aerial Photographs Other None -75 % -L& t CA AS I K 1987 MANUAL Date: County: State: Washington Plot 10: '; P - -7 TransectID: Community ID: /ts W�3Npecies Stratum Indicator 6. RwLms I �W-11 7 10. Jo tA --j 0 Hy rop getation PrAes'-er rt?.. e Basis for determination: *7 '�-o 07c, -- W L- n 4o' IA--;t- b9l-(�LPA— PRIMARY Indicators SECONDARY Indicators Inundated Oxidized Root Channels in Upper 12' Saturated in Upper 12' Water Stained Leaves Water Marks Local Soil Survey Data Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Field Observations :nwH -72q I I Depth of Surface Water. MIA' (in.) Depth to Free Water in Ph: (in.) Depth to Saturated Soil: (in.) Wetland Hydrology Present? K!sj No Basis for determination: t=- SOILS SoilsMappedAs: 6a,laivola 10a REMARKS: 0 ; yi --,4-j,,; TiKe- -S-,rxAA Taxonomy (Series and Phase): Profile Description: Depth Matrix Color Mottle Colors (inches) Horizon (Munsell Moist) (Muns If Moist) t-1 C) 10 r 's I- Ism Drainage Class: Field Observations Confirm Mapped Type? Yes No Vtv"" --7- Hydric Soil Indicators: Histosol Reducing Conditions organic Streaking in Sandy Soils Histic Epipedon Gleyed or Low Chroma Colors Listed on Local Hydric Soils List Suffidic Odor Concretions Listed on National Hydric Soils List Aquic Moisture Regime High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? (Ye�sl No REMARKS: A104�eC, I A J Basis for determination: % WETLAND DETERMINATION Is this Sampling Point Within a Wetland? No INVESTIGATOR: Basis for determination: ROUTINE WETLAND DETERMINATION - DATA FORM 1987 MANUAL ProjectJS,fte: Sec: Date: 6 C�pplicant/Cwner: Township: 2-�IfJ County: . 41, 7�7, — - Invi�fffigator(s): .64 Q:p� Range: State: Wdshington Plot ID: CO Do. Normal Circumstances exist on the site? �y �t§ pio- Is the site significantly & recently disturbed? (Atypical Situation) Yes No TransectID: Is the area a potential Problem Area? (explain in final remarks) Yes ,' �) jTo Community ID: VEGETATION Dominant Plant Soecies Stratum Indica1g_r Dominant Plant Sgecies Stratum Indicatpr 4� ke C-6 Auj 6. F 2. 7. 3. a. 4. 9. 10. Percent of Dominant Species that are Hydrophytic Vegetation c. �11 Present? Yes 0 OBL, FACW or FAG (excluding FAC-) % Basis for determination: REMARKS: HYDROLOGY .Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12* Aerial Photographs Saturated in Upper 12' Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Nautral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Field Observations Depth of Surface Water. /1k (in.) Depth to Free Water in Ph: (in.) Depth to Saturated Soil:. (in.) Wetland Hydrology Present? Yes No REMARKS: Basis for determination: SOILS Soils Mapped As: C�,-N nl, CA ock M 'A c Sa,,,J Drainage Class: Field Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color Mottle Colors Mottle (inchesl Horizon (Munsell Moist) (Munsell Moist) (Abundance/Co trast) Texture, Concretions, Structure. etc. CA j A.A. �40 IOVIA�l cri CA Hydric Soil Indicators: Histosol Histic Epipedon Suff idic Odor Aquic Moisture Regime Reducing Conditions Organic Streaking in Sandy Soils Gleyed or Low Chroma Colors Listed on Local Hydric Soils List Concretions Listed on National Hydric Soils List High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? Yes -'No,,, REMARKS: �Ic)-k(,eawv Basis for determination: WETLAND DETERMINATION Is this Sampling Point Within a Wetland? Yes No INVESTIGATOR: Basis for determination: - E) 1� 0 yl � V dA D'a vv' C-c-+y �> ROUTINE WETLAND DETERMINATION - DATA FORM I Project/Site: ki A-1�& &plicant./Owner: Ir*estIgitor(s): Do Normal Circumstances exist on the site? Is the site significantly & recently disturbed? (Atypical Situation) Is the area a potential Problem Area? (explain in final remarks) — ------ - ----- t - , - / VEGETATION .- I I - Dominant Plant Soecies Stratum Indicator 1. w"-" a u- H--- — 2. PAAM 3. LA 1-/i i 4. 5. Percent of Dominant Species that are OBL, FACW or FAC (excluding FAC-) REMARKS: 14 Sec: 4� Township: 7 Range: ;(Yes No 6S N�6-) 6. V C A. !�J e- 1) I 7 8. 9. 10. 1967 MANUAL Date: County: State: Washington Plot ID: a TransectID: Community ID: Hydrophytic Vegetation Present? Yre's) N o -7 % Basis for determination: C 9 VA L WN HYDROLOGY 1-1 Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12" Aerial Photographs Saturated in Upper 12' Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Field Observations it Depth of Surface Water'. IV— (in.) Depth to Free Water in Pft: - 1 (in.) Depth to Saturated Soil: (in.) N Wetland Hydrology Presentl )iees; 0 Basis for determination: ��z 4 SOILS Soils Mapped As: 4� Taxonomy (Series and Phase): Profile Description: Depth (inches) Horizon 0-7l r I -7-/4" jL14_ REMARKS: 474 4 �1'iv f. CIL A 0 [ Ct- I Oa 44U ' Matrix Color Mottle Colors Mottle (Munsell Moistj (Munsell Moist) (Abundance/Co trast) t CN �- 3h 40 7- r 64 PM Pl.� LL Draina§e Class: Field Observations Confirm Mapped Type? Yes No Texture, Concretions, Structure. etc. Hydric Soil Indicators: Histosol Reducing Conditions Organic Streaking in Sandy Soils Histic Epipedon Gleyed or Low Chroma Colors Listed on Local Hydric Soils List I Listed on National Hydric Soils List Suffidic Odor Concretions Aquic Moisture Regime High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? (�e:; No REMARKS: Basis for determination-.".. 0l,,2 �j PAO'" WETLAND DETERMINATION Is this Sampling Point Within a Wetland? (�es No INVESTIGATOR: Basis for determination: VeL Co",Ltt yv\ e-f- 4-10 C- ROUTINE WETLAND DETERMINATION - DATA FORM Project/Site: �4 I ApplicanV('wner: Investigator(s): Do Normal Circumstances exist on the site? Is the site signif icantly & recently disturbed? (Atypical Situation) Is the area a potential Problem Area? (explain in final remarks) VEGETATION Dominant Plant Species Stratum Indicator 2. U3 L_ 3. '�4 4.. 5. Percent of Dominant Species that are OBL, FACW or FAC (excluding FAG-) REMARKS: 1987 MANUAL Sec: Date: Township: e-­2,^1 _,L County: Range: - State: Washington Ees-) No Plot ID: <; Lf- CYe_s::) No TransectID: Community ID: DomLnant Plant Species ____5j_rjjtum Indicatp_r 6. 7. Hydrophytic Vegetation Present? oYes Basis for determination: & 11,t gav-�4�"u No [ae ir HYDROLOGY Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12' Aerial Photographs Saturated in Upper 12' Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Field Observations Drainage Patterns in Wetlands Depth of Surface Water. F-- (in.) Depth to Free Water in Ph: (0 /L (in.) Depth to Saturated Soil: 5L Wetland Hydrology Present? (Yes-) No REMARKS: Basis for determination: Is Ct +U V, I(A-_ 0 1.1 SOILS Soils Mapped As: 511\ /V%k.A. C, Taxonomy (Series and Phase): Profile Description: Depth Cinches) Horizon Matrix Color (Munsell Moistj 21JL,- ', Mottle Colors Mottle (Munsell Moist) (Abundance/Contrastl Drainage Class: Field Observations Confirm Mapped Type? Yes No Texture, Concretions, Struictur% etc, AA L.A- r- 4- ;r oo L4 v Hydric Soil Indicators: Histosol Reducing Conditions organic Streaking in Sandy Soils Histic Epipedon Gleyed or Low Chroma Colors Listed on Local Hydric Soils List Suffidic Odor Concretions Listed on National Hydric Soils List Aquic Moisture Regime High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present - ? CY�e s) No REMARKS: Basis for determination - WETLAND DETERMINATI ON Is this Sampling Point Within a Wetland? es No INVESTIGATOR, Basis for determination: - 9 ROUTINE WETLAND DETERMINATION - DATA FORM 1987 MANUAL Project��ite: Sec: Date:-- >/7 <f;N?pIicaritj('wner: ' t2--o,-, Township: County: I n v e-sl ig- ie0r, (s): Range: �,4-_ State: Washington Do Normal Circumstances exist on the site7 jps No Plot ID: Is the site signif icantly & recently disturbed; (Atypical Situation) Yes <R TransectID: Is the area a potential Problem Area?,(explain in final remarks) Yes (No) Community ID: VEGETATION Dominant Plant Species Stratum Indicator Qo_mm�ff Plant Soecies Stratum Indicator . r-5 6. C-0y'v'+C, 2. 7. 3. R4%'S &� S C-'010V FAUk 8Cn,'1,V01V.!j4 Sep'101AA 4. 9.50AUS , CA 5 �p L t7-) 5. 10. rA0_AJ4 Percent of Dominant Species that are PEL, FACW or FAC (excluding FAC REMARKS: :HYDROLOGY .:�.�.-�-Rkorded Data (Describe in Remarks): Stream, Lake or Tide Gauge Aerial Photographs Other None Field Observations Depth of Surface Water hl'� (in.) Wetland Hydrology Present? (Yes) No r Basis for determination: I I - Hydrophytic Vegetation Present? - Yoes No % Basis for determination: S-0 �/ '0 va _�A.naA '��( IV V5.1--4— c-4,(AIA+ C�CAP14P t PRIMARY Indicators SECONDARY Indicators Inundated Oxidized Root Channels in Upper 12' Saturated in Upper 12' Water Stained Leaves Water Marks Local Soil Survey Data Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Depth to Free Water in Pit: (in. REMARKS: I All '_�Ll 1'1A 11TAC^-1' W If M P SOILS SoilsMappedAs: MUe,�_ Taxonomy (Series and Phase): Profile Description: Depth (inchesl Horizo Matrix Color (Munsell Moist) Hydric Soil Indicators.: Histosol ::3C-Histic Epipedon Suff idic Odor Aquic Moisture Regime Mottle Colors (Munsei! Moist I v�q �L q4 Depth to Saturated Soil: (in.) Drainage Class: Field Observations Confirm Mapped Type? Yes No Texture, Concretions, Structure. etc, Mo I S_� Al W _? Ic- A'LA JV/ LA Organic Streaking in Sandy Soils Reducing Conditions Gleyed or Low Chroma Colors Listed on Local Hydric Soils List Concretions Listed on National Hydric Soils List High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? Yes) No REMARKS: Basis for determination: CIAV- . 0 V\A 4A, WETLAND DETERMINATION Is this Sampling Point Within a Wetland? iYes'. No INVESTIGATOR: Basis for determination: ROUTINE WETLAND DETERMINATION - DATA FORM Project/Site: rt-)6rA.7 Sec: Township: r-, tJ— plicanV(7wner: Range: Do Norm a[ Circumstances exist on the site? rY �esl N o Is the site significantly & recently disturbed? (Atypical Situation) vis Is the area a potential Problem Area? (explain in final remarks) Yes �-O) VEGETATION Dominant Plant Species Stratum IndicnLr 1. —PLA IDUS 12VOCCA-e-k �41:SCWO!)- C—�N 2. 3. OZ . 5Z401 P 00^ 4. 5. Percent of Dominant Species that are OBL, FACW or FAG (excluding FAC-) REMARKS: 1987 MANUAL Date: 0/7 County: - State: Washihgton Plot ID: TransectID: Community ID: Linant Plant Si2ecies Stratum Indicator f& U 7. 9. 10. Hydrophytic Vegetation Present? oes No *3-3 % Basis for determination: 'V�7� — ir K HYDROLOGY Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12- Aerial Photographs Saturated in Upper 12" Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-NeWal Test Sediment DeDosits Other (Explain in Remarks) Drainage Patterns in Wetlands Field Observations Depth of Surface Wate (in.) Depth to Free Water in Pit: 15- (in.) Depth to Saturated Soil:. (in.) Wetland Hydrology Present? es No REMARKS: Basis for determination: Ll I SOILS Soils Mapped As: c M Lt Ck— Drainage Class: Field Observations Taxono . my (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munself Moist) Mottle Colors ell Moist) no Ae4r-akiL 1 01 - [Iff-011ure . a - a - UK-x4rararem. (PTIPWIRKAPIPMU ,�14 U ril_- Hydric Soil rs: Histosol Reducing Conditions Organic Streaking in Sandy Soils Histic Epipedon Gleyed or Low Chroma Colors Listed on Local Hydric Soils List Suffidic Odor Concretions Listed on National Hydric Soils List Aquic Moisture Regime High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? Yes" No REMARKS: Basis for determination: dF1 0 V-� WETLAND DETERMINATION -) No Is this Sampling Point Within a Wetland? (Yes INVESTIGATOR: Basis for determination: -S ROUTINE WETLAND DETERMINATION - DATA FORM .Project/Site: H; 6-A Sec* 5 �_4plican,C'wner: 0--V�4 0;�- 1,��Jj-(Otj Township: 7 �t- - -:!4 ' Investigator(s): &�'A-i R n e.. .5 r;7- 2 Do Normal Circumstances exist on the site'? �Ye No Is the site significantly & recently disturbed? (Atypical Situation) �fes Is the area a potential Problem Area? (explain in final remarks) Yes no VEGETATION Dominant Plant Species Stratum Indicata 1 "' PIP 6�, .2 -cteci -AOAq 2. to'(Wr^ �1 tl-� R�- 3. f�qLirSek*v\. F 4. jZkA b,-AS F V6 Percent of Dominant Species that are OBL, FACW or FAC (excluding FAC-) REMARKS: t6c.0-+a4, 1's aj HYDROLOGY Recorded Data (Describe in Remarks) Stream, Lake or Tide Gauge Aerial Photographs Other None Field Observations Depth of Surface Water. IV (in.) Wetland Hydrology Present? es; No Basis for determination: 1987 MANUAL Date: county: State: Washington Plot ID: `� P— I TransectID: Community ID: As5e " Defrinant Plant S12ecies Stratum Indicatq_r 6. AlhuS LIM y 7.Ccv\V 0 tAl U'�' -Se 10. Hydrophytic Vegetation Present? �Y!Ds No Basis for determination: PRIMARY Indicators Inundated Saturated in Upper 12" Water Marks Drift Lines Sediment Deposits Drainage Patterns in Wetlands 11-b-f e-�' eV'0VA'Zj'-S SECONDARY Indicators Oxidized Root Channels in Upper 12" Water Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Dept h to Free Water in Pit: (a /I (in.) Depth to Saturated Soil. -:Lb(,( �e- (in..) REMARKS: SOILS Soils Mapped As: Drainage Class:___ Field Observations Taxonomy (Series and Phase): Confirm Mapped Type? S No Profile Description: Depth Matrix Color Mottle Colors Mottle (inchesl Horizon (Munsell Moi5tj (Munsell Moistj (Abundance/Contrast) Texture, Concretoons. Structure. etc. 0 Ry—ddc Soil Indicators: Histosol Reducing Conditions Histic Epipedon Gleyed or Low Chroma Colors Suffidic Odor Concretions Aquic Moisture Regime High Organic Content in Surface Layer in Sandy Soils es Hydric Soils Present? No REMARKS: Basis for determination: a ------- - - - --- - ------ - ------- -- Ui�h- - ------- ------- ------ WETLAND DETERMINATION Is this Sampling Point Within a Wetland? ' Yes) No INVESTIGATOR: Basis for determination: 0-u- iiAv E�f � C" V��' Organic Streaking in Sandy Soils Listed on Local Hydric Soils List Listed on National Hydric Soils List C� APPENDIX E Earthen Trench Plug TRENCH PLUG WITH SELECTED LOW PIERVEABLE. ArOmOf SPEASIBLE CLAY kArERYAL (MIN. Pt.ASTICIrr INDEX OF iOL CQmPACrED tO 95% RELATIVE COMPACrION. szc worE z.---i 8ACKFILL AS REOUIRED TRENCH LIS. 00 rTom 5rc Norc j TOP Of TRENCH Pf accalvc WES.* 1. TRENCH PLUG SHALL BE KEYED imro rAcm SIDE AND BOrrOM OF TRENCH A MINIUVM Of 64. 2. - wHEPE suirA&E IMPERVIOUS MATENAL is Nor AVAILABLE. LEAN idix COmCAUE MAY BE SuasrirurEa J. PROVIDE TRENCH PLWS Ar LOCATIONS ANO INrEWALS SPECIFIED. EARTHEN TRENCH PLUG